VIENNA, March 16 (Reuters) - The United States and three European allies have had "very good" talks on President Donald Trump's demand that their nuclear deal with Iran be improved by a May 12 deadline, a U.S. envoy said on Friday.
Trump has threatened to withdraw the United States from the accord between Tehran and six world powers, signed in 2015 before he took office, unless France, Britain and Germany help agree a follow-up pact by that date. Trump does not like the deal's limited duration, among other things.
A State Department cable obtained by Reuters last month, however, outlined a path under which the three key European allies would simply commit to try to improve the deal over time in return for Trump keeping the pact alive by renewing U.S. sanctions relief in May.
Senior officials from the countries which signed the deal held a quarterly meeting in Vienna on Friday. Separately, the U.S. delegation met their counterparts from France, Britain and Germany on Thursday, U.S. envoy Brian Hook said.
"What the president has asked us to do is to work with our European allies and see if we can come to an agreement before May 12 and we don't have any instructions beyond May 12," Hook said at a news conference, three days after Trump fired Secretary of State Rex Tillerson.
He reiterated the three broad complaints Trump has of the nuclear deal - its limited duration, the fact it does not cover ballistic missile testing, and U.N. inspections of Iranian facilities - but did not say what form of agreement he was seeking.
"I don't want to prejudge what kind of mechanisms that we will use to reach an agreement with the Europeans. What the president said on Jan. 12 is that we much reach a supplemental agreement with the European allies in three specific areas," he said.
"This is the third meeting that we have had with the E3, (we) had very good discussions. There is a lot that we agree on and where we disagree we are working to bridge our differences," Hook said, adding: "We are taking things one week at a time."
Asked if Tillerson's sacking had affected the negotiations, he told reporters: "It hasn't affected the talks at all." (Reporting by Francois Murphy; Editing by Andrew Roche)
RELATED: Gifts world leaders have given US presidents
Gifts world leaders have given US Presidents
Gifts world leaders have given US Presidents
WASHINGTON DC - JULY 9: (NO U.S. TABLOID SALES) President Ford accepts a gift from Saudi Arabian Prince Abdallah Ibn Abd Al-Aziz Al-Saud in the Cabinet Room July 9, 1976, in Washington, DC. Also attending are Secretary of State Kissinger; National Security Advisor Brent Scowcroft; Defense Secretary Donald Rumsfeld; Abdul Azia Al Tuwayjiri, Deputy Commander of the National Guard; Ali Abdallah Alireza, Ambassador; and State Department interpreter Najib Najjar. (Photo by David Hume Kennerly/ Getty Images)
Canadian Prime Minister Pierre Trudeau (right) presenting a Bicentennial gift to US President Gerald Ford, in the Rose Garden of the White House, Washington DC, June 21st 1976. (Photo by Keystone/Hulton Archive/Getty Images)
President Dwight D. Eisenhower receives a replica of the Russian Lunik from Premier Nikita Khrushchev during his state visit to the American capital. Vice President Richard Nixon (l) watches. (Photo by mary delaney cooke/Corbis via Getty Images)
President John F. Kennedy shows off some of the gifts, a beaded tie and a doll, that were presented to him today during a visit to the White House by members of the National Congress of American Indians. The Chief Executive, an honorary member of several Indian tribes, called for greater national efforts to provide better living for American Indians.
Members of the United States Senate and House of Representatives present President Kennedy with a pair of cuff links after he signed his first bill as president. The congressmen present are: (from left to right) Rep. Fred Cchewengel, Rep. Peter Mack Jr., Sen. Everett Dirksen, Sen. Vance Hartke, Rep. Winfield K. Denton, Sen. John Sherman Cooper, William B. Brasy, and Sen. Paul H. Douglas.
(Original Caption) This is a close-up of the 8 month old Russian puppy on the left that arrived at the White House as a gift from Soviet premier Khrushchev to President Kennedy. The puppy, an offspring of Stelka, the Soviet space dog is for Mrs. Kennedy. Here, the puppy is introduced to Charley, the Kennedy's Welsh Terrier. The puppy's Russian passport, is in the foreground.
(Original Caption) Two rival political figures, apparently the best of friends, arrive by Transatlantic Airliner. Both the donkey and elephant are destined for Republican homes. The donkey, the animal adopted by the Democrats as their symbol, is a gift to David Eisenhower, the President's grandson, from the Spanish Foreign Minister. The elephant was imported from Siam for use in the Republican national campaign.
Fala, Scottish terrier of FDR, looking up at sphynx sculpture superimposed w. face of his master in room filled w. gifts received during FDR's presidency. (Photo by Time Life Pictures/Pix Inc./The LIFE Picture Collection/Getty Images)
(Original Caption) Pacific Palisades, California: Presidential-elect Ronald Reagan has his hands full as a white horse, a gift from the President of Mexico, Jose Lopez Portillo, rears as it is presented to him at a park near his home. The horse, Alamain, is from Portillo's private stable. January 12, 1981.
Irish Prime Minister Enda Kenny gives a gift of an etched bowl filled with traditional shamrocks to U.S. President Barack Obama during a St. Patrick's Day reception at the White House in Washington, March 19, 2013. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS)
US President George W. Bush (C) holds up a gift during a Gowning and Investiture Ceremony at the Executive Mansion in Monrovia, Liberia, on February 21, 2008. Bush is capping off a five-country Africa trip promising lasting friendship with the continent. Bush became the first US leader in 30 years to visit Liberia, a nation settled in the 1820s by slaves freed by the United States and still the closest US ally in Africa, but battered by a bloody series of civil wars. AFP PHOTO/Jim WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
U.S. President George W. Bush receives a gift from United Arab Emirates' President Sheikh Khalifa bin Zayed al-Nahayan at Al Mushref Palace in Abu Dhabi. The solid gold sash is studded by diamonds and gems. (Photo by Brooks Kraft LLC/Corbis via Getty Images)
U.S. President Bill Clinton is presented a gift of shamrocks by Irish Prime Minister Bertie Ahern on St. Patrick's Day at the White House, March 17. Clinton is continuing talks today with Irish leaders for peace in Northern Ireland.
Moscow, Russia. President Boris Yeltsin (C) of Russia presents President Bill Clinton (R) of the United States with a copy of the Union flag of the Civil War times during a meeting at the Moscow Kremlin. Alexander Chumichev; Alexander Sentsov/ITAR-TASS (Photo by TASS via Getty Images)
U.S. President Barack Obama is presented with a gift in honour of his mother, Stanley Ann Dunham, by Indonesia's President Susilo Bambang Yudhoyono during a state dinner at the State Palace-Istana Merdeka in Jakarta, November 9, 2010. Obama and his mother lived in Indonesia during Obama's early years. REUTERS/Jason Reed (INDONESIA - Tags: POLITICS)
A member of the U.S. government staff carries a bust of Mahatma Gandhi, presented as a gift to U.S. President Barack Obama, during his trip in New Delhi, November 8, 2010. REUTERS/Jason Reed (INDIA - Tags: POLITICS)
Pope Benedict XVI (R) exchanges gifts with U.S. President Barack Obama (2nd R) during their meeting in the pontiff's private library at the Vatican July 10, 2009. REUTERS/Osservatore Romano (VATICAN POLITICS RELIGION)
U.S. President Barack Obama (L) holds a gift he received from Saudi Arabia's King Abdullah during a meeting at the king's farm outside Riyadh June 3, 2009. REUTERS/Larry Downing (SAUDI ARABIA POLITICS IMAGES OF THE DAY)
King Abdullah of Saudi Arabia (2nd L) presents a gift to U.S. President George W. Bush in New York, November 13, 2008. REUTERS/Saudi Press Agency/Handout (UNITED STATES). FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS.
U.S. President George W. Bush receives a bowl of Shamrocks as a St. Patrick's Day gift from Irish Prime Minister Bertie Ahern in the Roosevelt Room of the White House, March 17, 2005. At right is first lady, Laura Bush. REUTERS/Larry Downing LSD/HB
U.S. President George W. Bush (L) receives a drawing depicting
"yabusame", Japanese traditional mounted archery, presented to him from
Japanese Prime Minister Junichiro Koizumi at the Foreign Ministry's
Iikura guest house in Tokyo February 18, 2002. Bush's Japan visit is
the first stop on a three-country tour through Asia. REUTERS/Katsumi
Former U.S. president Bill Clinton (R) receives a gift from Taiwan's parliamentary speaker Wang Jing-pyng after giving a speech at an event hosted by the Taiwan Democracy Foundation in Taipei February 27, 2005. Clinton will meet Taiwan President Chen Shui-bian on Sunday during a whirlwind visit to the island that China regards as a renegade province, but China was restrained in its reaction. REUTERS/Richard Chung TW
President Ronald Reagan standing next to horse named El Amamein, which was given to him as a gift from Mexican President, on ranch. (Photo by Pete Souza/White House/The LIFE Picture Collection/Getty Images)
German Federal Chancellor Helmut Schmidt together with his wife presenting a gift to the US President Ronald Reagan and his wife Nancy Reagan is standing to the right, the present is a couple of American Eagles, July 01, 1978, Bonn, Germany. (Photo by Thomas Imo/Photothek via Getty Images)
President Carter Receiving Gift (Photo by ï¿½ Wally McNamee/CORBIS/Corbis via Getty Images)
Ireland's Prime Minister Enda Kenny (R) presents a traditional gift of a bowl of shamrocks to U.S. President Donald Trump during a St. Patrick's Day reception at the White House in Washington, U.S. March 16, 2017. REUTERS/Jonathan Ernst
Pope Francis exchange gifts with U.S. President Donald Trump and his wife Melania during a private audience at the Vatican, May 24, 2017. REUTERS/Alessandra Tarantino/pool
U.S. President Donald Trump (R) receives a gift of a book of Psalms from Western Wall Heritage Foundation Director General Mordechai Elias (L) and Rabbi of the Western Wall Shmuel Rabinovitch (C) after leaving a note at the Western Wall in Jerusalem May 22, 2017. REUTERS/Jonathan Ernst