Drones hit a fuel tank and sparked a fire at Kuwait International Airport, the Gulf state's civil aviation authority said on Wednesday, as Iran presses on with its attacks in the nearly four-week regional war.

Citing preliminary information, the Directorate General of Civil Aviation said in a statement posted online that the attack had caused only "limited" damage and no casualties.

Firefighters were working to bring the blaze under control, said agency spokesman Abdullah Al-Rajhi.