An operations center targeted by an Iranian drone strike that killed six American soldiers was located in a civilian port in Kuwait, more than 10 miles away from the main Army base.

The incident that occurred late on Sunday was confirmed by top Pentagon officials during a Monday press conference.

Three American fighter jets were "mistakenly shot down by Kuwaiti air defenses," CENTCOM said in a statement ​Monday, as the war with Iran continued for a third day.

A tanker at anchor off Kuwait ​reported seeing a large explosion ‌on its port side and was taking on water, the United Kingdom ​Maritime Trade Operations (UKMTO) said.

A dispute has reignited over the weekend between Iraq and Kuwait over their maritime border. The development has prompted Gulf Arab countries to side with Kuwait, putting Baghdad on the defensive on Monday.

By Ahmed Hagagy, Jana Choukeir and Phil Stewart KUWAIT CITY, March 2 (Reuters) - Kuwait's air defences mistakenly shot down three U.S. F-15 fighter jets during active combat on Monday, U.S. Central Command said on Monday,