Nuclear attack drill underway outside New York City amid rising tensions in North Korea

Federal authorities and emergency workers in northern New Jersey are in the midst of a 4-day nuclear attack drill.

The exercise, called Operation Gotham Shield, is designed to help rescue workers practice how they would evacuate victims from New York City if the region were subject to a nuclear attack.

Simulations, which began on Monday, include setting up makeshift emergency rooms, establishing a triage facility outside MetLife Stadium, where the NFL's Giants and Jets play, and running through radiation check and decontamination protocols.

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North Korea unveils new weapons at military parade
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North Korea unveils new weapons at military parade
North Korean leader Kim Jong Un applauds during a military parade marking the 105th birth anniversary of the country's founding father, Kim Il Sung, in Pyongyang April 15, 2017. REUTERS/Damir Sagolj
Missiles are driven past the stand with North Korean leader Kim Jong Un and other high ranking officials during a military parade marking the 105th birth anniversary of country's founding father Kim Il Sung, in Pyongyang April 15, 2017. REUTERS/Damir Sagolj TPX IMAGES OF THE DAY
High ranking military officers cheer as North Korean leader Kim Jong Un arrives for a military parade marking the 105th birth anniversary of country's founding father Kim Il Sung, in Pyongyang April 15, 2017. REUTERS/Damir Sagolj
People react as they march past the stand with North Korean leader Kim Jong Un during a military parade marking the 105th birth anniversary of the country's founding father Kim Il Sung, in Pyongyang, April 15, 2017. REUTERS/Damir Sagolj
TOPSHOT - Korean People's Army (KPA) tanks are displayed during a military parade marking the 105th anniversary of the birth of late North Korean leader Kim Il-Sung in Pyongyang on April 15, 2017. North Korean leader Kim Jong-Un on April 15 saluted as ranks of goose-stepping soldiers followed by tanks and other military hardware paraded in Pyongyang for a show of strength with tensions mounting over his nuclear ambitions. / AFP PHOTO / Ed JONES (Photo credit should read ED JONES/AFP/Getty Images)
Korean People's Army (KPA) soldiers march on Kim Il-Sung squure during a military parade marking the 105th anniversary of the birth of late North Korean leader Kim Il-Sung in Pyongyang on April 15, 2017. North Korean leader Kim Jong-Un on April 15 saluted as ranks of goose-stepping soldiers followed by tanks and other military hardware paraded in Pyongyang for a show of strength with tensions mounting over his nuclear ambitions. / AFP PHOTO / Ed JONES (Photo credit should read ED JONES/AFP/Getty Images)
North Korean leader Kim Jong Un waves to people attending a military parade marking the 105th birth anniversary of country's founding father Kim Il Sung, in Pyongyang April 15, 2017. REUTERS/Damir Sagolj
Military vehicles carry missiles with characters reading "Pukkuksong" during a military parade marking the 105th birth anniversary of country's founding father Kim Il Sung, in Pyongyang April 15, 2017. REUTERS/Damir Sagolj
Members of the Korean People's Army (KPA) ride on mobile missile launchers during a military parade marking the 105th anniversary of the birth of late North Korean leader Kim Il-Sung in Pyongyang on April 15, 2017. North Korean leader Kim Jong-Un on April 15 saluted as ranks of goose-stepping soldiers followed by tanks and other military hardware paraded in Pyongyang for a show of strength with tensions mounting over his nuclear ambitions. / AFP PHOTO / Ed JONES (Photo credit should read ED JONES/AFP/Getty Images)
North Korean soldiers march and shout slogans during a military parade marking the 105th birth anniversary of the country's founding father Kim Il Sung in Pyongyang, North Korea, April 15, 2017. REUTERS/Damir Sagolj
An unidentified rocket is displayed during a military parade marking the 105th anniversary of the birth of late North Korean leader Kim Il-Sung in Pyongyang on April 15, 2017. North Korean leader Kim Jong-Un on April 15 saluted as ranks of goose-stepping soldiers followed by tanks and other military hardware paraded in Pyongyang for a show of strength with tensions mounting over his nuclear ambitions. / AFP PHOTO / Ed JONES (Photo credit should read ED JONES/AFP/Getty Images)
People carry flags in front of statues of North Korea founder Kim Il Sung (L) and late leader Kim Jong Il during a military parade marking the 105th birth anniversary Kim Il Sung in Pyongyang, April 15, 2017. REUTERS/Damir Sagolj TPX IMAGES OF THE DAY
North Korean soldiers march and shout slogans during a military parade marking the 105th birth anniversary of country's founding father, Kim Il Sung in Pyongyang, North Korea April 15, 2017. REUTERS/Damir Sagolj TPX IMAGES OF THE DAY
A soldier salutes from atop an armoured vehicle as it drives past the stand with North Korean leader Kim Jong Un during a military parade marking the 105th birth anniversary of country's founding father Kim Il Sung, in Pyongyang April 15, 2017. REUTERS/Damir Sagolj
North Korean soldiers march and shout slogans during a military parade marking the 105th birth anniversary of country's founding father Kim Il Sung in Pyongyang, North Korea, April 15, 2017. REUTERS/Damir Sagolj
North Korean soldiers attend a military parade marking the 105th birth anniversary of country's founding father Kim Il Sung in Pyongyang, North Korea, April 15, 2017. REUTERS/Damir Sagolj
Attendees carry sheets in colours of the national flag of North Korea during a military parade marking the 105th birth anniversary of country's founding father Kim Il Sung, in Pyongyang April 15, 2017. REUTERS/Damir Sagolj
North Korean soldiers, some of them on horses, march during a military parade marking the 105th birth anniversary of country's founding father Kim Il Sung in Pyongyang, North Korea, April 15, 2017. REUTERS/Damir Sagolj
Civilian attendees watch North Korean soldiers marching during a military parade marking the 105th birth anniversary of country's founding father Kim Il Sung in Pyongyang, North Korea, April 15, 2017. REUTERS/Damir Sagolj
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The effort is overseen by numerous federal agencies including the Department of Defense, Homeland Security, and FEMA.

SEE MORE: North Korea announces plans to conduct 'weekly' missile tests, warns of 'all out war'

Authorities assured the media and citizens that the drill is strictly routine and is in no way a response to any suspected nuclear threat.

But the escalating tensions between the North Korea and the United States caused concerns.

The country marked its leaders birthday with a massive military parade in which it showed off new weapons, but then followed the event with a failed missile test.

Officials in the country have promised to conduct weekly tests and threatened "all out war" if the United States does not cease what they have called aggressive tactics.

On Wednesday a North Korean government official gave a rare interview in which he promised that nuclear tests "never stop" as long as the US continued to commit so-called "acts of aggression."

"As long as America continues its hostile acts of aggression, we will never stop nuclear and missile tests," Sok Chol Won said, according to CNN.

The U.S. has also been conducting tests, launching an unarmed intercontinental ballistic missile on April 26, according to military officials.

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