(Reuters) - Crude futures fell nearly $1 on Wednesday as a potential deal between Iran and the U.N. nuclear watchdog eased fears of oil supply disruption, while concerns over the debt crisis in the euro zone and a slowing Chinese economy weighed on demand.

U.S. crude for July delivery fell 94 cents and hit a low of $90.91 a barrel.

(Reporting by Florence Tan; Editing by Richard Pullin)