Two Air Force B-1B Lancer bombers flew near the Korean Peninsula Monday, days after North Korea conducted another ballistic missile launch, Pacific Air Forces officials tell Military.com.

The bombers departed Andersen Air Force Base, Guam, to conduct “bilateral training missions with their counterparts from the Republic of Korea and Japanese air forces,” said Lt Col Lori Hodge, PACAF public affairs deputy director.

Hodge did not specify how close the bombers flew to the Korean Demilitarized Zone, known as the DMZ, but said they were escorted by South Korean fighter jets.

When asked if the bombers were carrying weapons, the command wouldn’t disclose, citing standard operating policy.

In September, the service put on a similar show of force over South Korea, deploying B-1B bombers alongside South Korean fighter jets after another nuclear test from North Korea.

The U.S. military has maintained a deployed strategic bomber presence in the Pacific since 2004.

While Hodge said the training was routine, the recent flyover marks another in a series of events the U.S. has taken to deter North Korea’s Kim Jong Un from additional ballistic missile tests — the latest which occurred April 28.

U.S. Pacific Command on Friday detected the missile launch near the Pukchang airfield, the command said at the time. “The missile did not leave North Korean territory,” PACOM said.

The isolated regime claims to have fired off at least seven missile tests, one space rocket and two nuclear weapons tests since 2016.

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