"Kuwait International Airport has been subjected to blatant attacks by drones launched by Iran and the armed factions it supports," the official Kuwait News Agency quoted the spokesman of the General Directorate of Civil Aviation as saying.

The spokesman, Abdullah Al?Rajhi, said "fuel storage tanks... were targeted, resulting in a large fire at the site", reporting no casualties.

Iran has fired missiles and drones at Israel and US allies in the Gulf since the start of the war, which began with US-Israeli strikes against the Islamic republic on February 28.

Elsewhere in the Gulf on Wednesday, Bahrain's interior ministry said a fire broke out at a business facility "as a result of the Iranian aggression".

Saudi Arabia's defence ministry said several drones were "intercepted and destroyed".

In the waters off Qatar, a British maritime security agency said a tanker was hit.

The UK Maritime Trade Operations said it had received a report of an incident 17 nautical miles (31 kilometres) north of Doha in which a "tanker has been hit by unknown projectile on the port side causing damage to the hull above water line. The crew are reported as safe."

It added there was "no environmental impact" and that authorities were investigating the incident.