UN chief urges restraint, avoid escalation in Syria

UNITED NATIONS, April 14 (Reuters) - U.N. Secretary-General Antonio Guterres urged all states on Saturday "to show restraint in these dangerous circumstances and to avoid any acts that could escalate matters and worsen the suffering of the Syrian people."

He said international investigators were in Syria and ready to visit the site of a suspected deadly chemical weapons attack in Douma, which prompted military action by the United States, France and Britain.

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Destruction in Syria after US-led airstrikes
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Destruction in Syria after US-led airstrikes
A Syrian soldier sprays water on the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry, on April 14, 2018. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
A Syrian soldier sprays water on the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry, on April 14, 2018. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
U.S. FIFTH FLEET AREA OF OPERATIONS - APRIL 14: In this handout released by the U.S. Navy, the guided-missile cruiser USS Monterey (CG 61) fires a Tomahawk land attack missile at Syria as part of an allied strike April 14, 2018. Monterey is deployed to the U.S. 5th Fleet area of operations in support of maritime security operations to reassure allies and partners and preserve the freedom of navigation and the free flow of commerce in the region. President Donald Trump has ordered a joint force strike on Syria with Britain and France over the recent suspected chemical attack by Syrian President Bashar al-Assad.(Photo by Matthew Daniels/U.S. Navy via Getty Images)
A journalist films the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry, on April 14, 2018. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
This picture taken on April 14, 2018 shows the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
U.S. FIFTH FLEET AREA OF OPERATIONS - APRIL 14: In this handout released by the U.S. Navy, the guided-missile cruiser USS Monterey (CG 61) fires a Tomahawk land attack missile at Syria as part of an allied strike April 14, 2018. Monterey is deployed to the U.S. 5th Fleet area of operations in support of maritime security operations to reassure allies and partners and preserve the freedom of navigation and the free flow of commerce in the region. President Donald Trump has ordered a joint force strike on Syria with Britain and France over the recent suspected chemical attack by Syrian President Bashar al-Assad.(Photo by Matthew Daniels/U.S. Navy via Getty Images)
This picture taken on April 14, 2018 shows the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
Syrian soldiers inspect the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry, on April 14, 2018. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
TOPSHOT - A Syrian soldier inspects the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry, on April 14, 2018. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
TOPSHOT - Syrian soldiers inspect the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry, on April 14, 2018. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
Syrian soldiers extinguish a fire in the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry, on April 14, 2018. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
A Syrian soldier inspects the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry, on April 14, 2018. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
A journalist inspects the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry, on April 14, 2018. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
A Syrian soldier takes a picture of the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry, on April 14, 2018. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
Journalists inspects the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry, on April 14, 2018. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
Journalists take pictures of the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry, on April 14, 2018. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
A Syrian soldier inspects the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry, on April 14, 2018. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
This picture taken on April 14, 2018 shows the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
Syrian government forces wait for vehicles carrying Jaish al-Islam fighters and their family members evacuated from the Eastern Ghouta town of Douma, to arrive at the Wafideen crossing on April 14, 2018. Rebels in Syria's Eastern Ghouta surrendered their heavy weapons and their leader left the enclave, a monitor said, signalling the end of one of the bloodiest assaults of Syria's seven-year war. / AFP PHOTO / STRINGER (Photo credit should read STRINGER/AFP/Getty Images)
This picture taken on April 14, 2018 shows the wreckage of a building described as part of the Scientific Studies and Research Centre (SSRC) compound in the Barzeh district, north of Damascus, during a press tour organised by the Syrian information ministry. The United States, Britain and France launched strikes against Syrian President Bashar al-Assad's regime early on April 14 in response to an alleged chemical weapons attack after mulling military action for nearly a week. Syrian state news agency SANA reported several missiles hit a research centre in Barzeh, north of Damascus, 'destroying a building that included scientific labs and a training centre'. / AFP PHOTO / LOUAI BESHARA (Photo credit should read LOUAI BESHARA/AFP/Getty Images)
The destroyed Scientific Research Centre is seen in Damascus, Syria April 14, 2018. REUTERS/Omar Sanadiki
The destroyed Scientific Research Centre is seen in Damascus, Syria April 14, 2018. REUTERS/Omar Sanadiki
A Syrian military officer records a video inside the destroyed Scientific Research Centre in Damascus, Syria April 14, 2018. REUTERS/Omar Sanadiki
A Syrian firefighter is seen inside the destroyed Scientific Research Centre in Damascus, Syria April 14, 2018. REUTERS/Omar Sanadiki
Syrian firefighters are seen inside the destroyed Scientific Research Centre in Damascus, Syria April 14, 2018. REUTERS/Omar Sanadiki
A Syrian firefighter is seen inside the destroyed Scientific Research Centre in Damascus, Syria April 14, 2018. REUTERS/Omar Sanadiki
The destroyed Scientific Research Centre is seen in Damascus, Syria April 14,2018. REUTERS/Omar Sanadiki
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(Reporting by Michelle Nichols; Editing by Daniel Wallis)

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