Donald Trump appeared unaware on Wednesday that four U.S. soldiers had gone missing during a NATO training exercise in Lithuania.

When asked by a reporter if he had been briefed on the situation that began to unfurl hours before, the president replied, “No, I haven’t.”

He then moved on to take another question.

Watch the exchange here:

The missing soldiers are all from the 1st Brigade, 3rd Infantry Division, which is currently deployed to reinforce NATO amid rising tensions with Russia.

They disappeared during a tactical training exercise in Pabradė, roughly six miles from the border with Belarus, an ally of Russia, according to a statement from the U.S. Army.

The soldiers’ armored Hercules vehicle was found submerged in a body of water within the training area, the Army confirmed.

“The search [for the soldiers] is ongoing,” NATO wrote in a statement on X, formerly Twitter.