By Arathy Somasekhar and Anushree MukherjeeHOUSTON, Sept 9 (Reuters) - Brent crude futures breached $100 a barrel on Wednesday to settle at their highest close since late May after Iran and the U.S. struck tankers in the biggest wave of attacks on shipping since the war began, threatening to worsen the disruption of energy supplies from the Middle East.

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

Renewed fighting stokes fears of deeper disruptions