Pakistan, July 14 -- Oil prices jumped and Asian shares were mostly lower Monday after the U.S. carried out airstrikes and Iran retaliated.

The price of Brent crude, the international standard, gained 3.6% to $78.76 per barrel, while U.S. benchmark crude added 3.5% to $73.97 per barrel. Prices for both types of crude oil recently had slipped back to around the levels they were at before the war with Iran began after the two sides set an interim agreement on ending the conflict and ships resumed transporting oil through the Strait of Hormuz.

However, the United States launched several waves of strikes on Iran into Monday morning over an Iranian attack on a container ship in the strait that set it ablaze and left a crew member missing ove...