Gulf hostilities flared again on Wednesday as Iranian attacks on Kuwait killed one person, injured at least 63 and damaged the international airport.

Meanwhile, the U.S. military carried out strikes near the Strait of Hormuz, and diplomacy to halt the war showed little sign of progress.

The attacks sent oil prices up more than 2%, as the strait remains largely closed more than three months after the U.S. and Israel launched strikes on Iran.

Flights at Kuwait International Airport were suspended after an Iranian drone and missile attack damaged the Terminal 1 building at the airport and diplomatic missions, according to Kuwaiti authorities and state media. It did not say which missions.

The civil aviation authority later said Kuwait Airways was resuming flights from Terminal 4, after evaluating damage and taking safety measures.

Kuwait's military said it had tracked and intercepted 13 ballistic missiles and 17 drones in Kuwaiti airspace since dawn on Wednesday, with debris falling in several residential areas.

In Bahrain, the army said it had intercepted three missiles and several drones, as Iran said it had attacked the headquarters of the U.S. Fifth Fleet in the country, as well as an airbase and helicopters in another, unspecified, regional state.

The U.S. military said two Iranian missiles aimed at Kuwait fell short or broke up in flight, while several ballistic missiles failed to strike their targets in the region.

It also said it had carried out a strike on a tanker heading for Iran.