By Arathy SomasekharHOUSTON, Sept 9 (Reuters) - Brent crude futures breached $100 a barrel on Wednesday for the first time since late July, as Iran and the U.S. hit tankers in the biggest wave of attacks on shipping since the war began, threatening to worsen the ongoing impairment of energy supplies from the Middle East.Front-month Brent crude futures were up $3.40, or 3.5%, at $101.32 a barrel as of 11:15 a.m. ET (1515 GMT), after touching a high of $101.55. U.S. West Texas Intermediate crude was up $3.45, or 3.7%, at $96.48 a barrel, highest since early June.

US-Iran clashes hit tankers, choke key Gulf route and lift crude prices

Brent crude moved closer to $100 as renewed U.S.-Iran tensions and threats to Gulf shipping raised fears of prolonged oil supply disruptions.

Brent crude oil futures hit a more than six-week high on Wednesday (Sep 9).