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Gulf hostilities flared again on Wednesday, with a missile attack damaging Kuwait’s airport and the US military carrying out strikes near the Strait of Hormuz, as diplomacy between Washington and Tehran showed little progress.

The latest flare-up, which sent oil prices up more than 1 per cent, comes with the conflict stalemated in a shaky ceasefire and the Strait of Hormuz largely closed, more than three months after initial US and Israeli strikes on Iran.

Flights at Kuwait International Airport were suspended and diverted elsewhere until further notice, the state news agency said, citing aviation authorities, after an Iranian drone and missile attack on its T1 building.

The attack caused injuries and severely damaged some airport facilities, it added, but gave no further details.