Sri Lanka, March 1 -- Brent crude jumped 10% to about $80 a barrel over the counter on Sunday, oil traders said, while analysts predicted that prices could climb as high as $100 after U.S. and Israeli strikes on Iran plunged the Middle East into a new war.

The global oil benchmark has rallied this year and reached $73 a barrel on Friday for its highest since July, buoyed by growing concern over the potential attacks that arrived a day later. Futures trading is closed over the weekend.

"While the military attacks are themselves supportive for oil prices, the key factor here is the closing of the Strait of Hormuz," said Ajay Parmar, director of energy and refining at ICIS.

Most tanker owners, oil majors and trading houses have suspended ...