"Our investigation and review into the Kuwait passenger terminal attack shows that the IRGC Air Force did not fire any shots at this target," said Guards spokesman Hossein Mohebi, according to the IRGC's official Telegram channel.

He said that "the destruction of the Kuwait airport passenger terminal was caused by an error in the American Patriot systems, which landed on the terminal after failing to intercept Iranian missiles".

The Guards earlier said they had targeted a different location, "the Ali Al Salem Air Base in Kuwait, which hosts helicopters" for the US.

The attack on Kuwait's airport on Wednesday temporarily halted operations, but air traffic resumed later in the day with all Kuwait Airways flights operating again.

The Gulf nation's ministry of defence said 30 ballistic missiles and drones were launched as part of the "heinous Iranian aggression", which caused "significant material damage to the building".

The Indian foreign ministry confirmed one of its citizens was killed at the airport and condemned the strike.

"We again call on all parties to cease such attacks" on civilian targets, it said in a statement.

An airport source told AFP the deceased was a traveller.

Kuwaiti health ministry spokesman Abdullah al-Sanad said 63 people were treated for injuries "including head wounds, cerebral hemorrhages, amputations and injuries resulting from explosions".

Kuwait's international airport was targeted several times during the war, and had only fully resumed operations on June 1.