Fresh fighting erupted across the Gulf on Wednesday as Iranian missile and drone attacks damaged Kuwait’s main airport and injured dozens of people, while the United States launched military strikes near the Strait of Hormuz, deepening fears that efforts to secure a lasting ceasefire are faltering.

The latest violence has added pressure to a fragile truce that has struggled to hold since it was agreed in April. Oil prices climbed more than two percent as uncertainty persisted over the future of the Strait of Hormuz, one of the world’s most important energy shipping routes, which remains largely closed more than three months after U.S. and Israeli strikes on Iran triggered a wider regional conflict.

Read also: Flights suspended as Iran drone attack hits Kuwaiti airport, causing injuries

According to Reuters, Kuwait suspended operations at Kuwait International Airport after Iranian drones and missiles struck airport facilities and diplomatic compounds. Kuwaiti authorities said one person was killed and more than 60 others were injured in the attacks.

The country’s civil aviation authority later announced that Kuwait Airways had resumed flights from Terminal 4 after safety inspections and damage assessments were completed.