NEW YORK — Oil prices jumped 5 percent on Thursday, with both major benchmarks trading at over $100 a barrel as the biggest spike in attacks on shipping since the Iran war began fed worries about further disruptions to already tight supplies. Brent crude futures were up $5.39, or 5.33 percent, at $106.60 a barrel by 11:49 a.m. ET (1549 GMT). U.S. oil topped $100 a barrel for the first time since May as West Texas Intermediate crude futures rose $5.16, or 5.37 percent, to $101.21. Brent prices have surged by more than 30 percent from lows touched in early August as a permanent agreement between the U.S. and Iran to cease attacks never materialized and fighting resumed. Iran-aligned Houthis seized control of Yemen's port of Mocha on Thursday, posing further threat to Red Sea traffic, while Gulf traffic remains restricted through the Strait of Hormuz as tanker attacks in the region have intensified in recent days. Attacks from Yemen on Saudi energy facilities introduce a fresh source of market risk, expanding concerns beyond Iran and the Strait of Hormuz, said Simon-Peter Massabni, head o