Today the six world powers in nuclear negotiations with Iran say talks have entered a new phase.
The deadline for the nuclear negotiations was originally Tuesday, but no deal has been reached. Officials say this new phase is aimed at reaching a comprehensive accord by the end of June.
The talks have been extended twice since November.
Officials say differences remain on how long Iran must limit nuclear research, where stockpiles of enriched uranium should be stored and the timing and scope of sanctions relief.
Critics say the deal under consideration would keep Tehran's nuclear technology intact, allowing the hardline Islamic regime to...