Brent crude was flat on Thursday, managing to hold above $60 a barrel as investors brushed aside bearish U.S. inventories data to focus on the lack of a deal in talks over Iran’s nuclear program. Tehran’s ambassador to the International Atomic Energy Agency (IAEA) said on Wednesday no deal had been reached on the duration of any possible final agreement with world powers on Iran’s program. The April contract inched up 5 cents to $60.60 a barrel by 0003 ET while West Texas Intermediate (WTI) crude rose 22 cents to $51.75 a barrel.