Iran said it was suspending cooperation with the U.N. atomic agency, denying international inspectors the chance to assess the damage done by U.S. and Israeli airstrikes on its main nuclear sites and setting up a new clash with Washington and other Western powers.

Oil futures edged up on Wednesday as Iran suspended cooperation with the U.N. nuclear watchdog and markets weighed expectations of more supply from major producers next month while the U.S. dollar softened further.