One of five U.S. service members to be listed as “seriously wounded” during major combat operations against Iran has died.

“Kuwait has acknowledged this incident,” according to U.S. Central Command. All six crew members have been recovered and are in stable condition.

Trump said the U.S. would “avenge” the deaths of three U.S. service members and that “there will likely be more” killed before the conflict ends.

President Trump also said Iran’s naval headquarters has been “largely destroyed” in a different attack.

U.S. Central Command officials announced Sunday that three U.S. service members were killed in action during combat operations.