An American-Kuwaiti journalist has been detained by authorities in Kuwait after he commented on videos and images related to the US-Israeli war with Iran, the Committee to Protect Journalists (CPJ) has said.

Ahmed Shihab-Eldin has not been seen since 2 March and is understood to be facing charges including spreading false information, according to the press freedom watchdog. It called for his immediate and unconditional release.

There was no immediate comment from Kuwaiti authorities.

However, Kuwait and other Gulf Arab states have said they have detained people for sharing footage documenting Iranian missile and drone attacks on their territory during the war.

Kuwait's military and health ministry have reported that Iranian attacks have killed three civilians, two soldiers and two border guards.