A senior Iranian negotiator says some outstanding issues still remain in the negotiations between Iran and six world powers over Tehran's nuclear program.

�Talks have reached the final breathtaking moments; certain issues still remain,� Abbas Araqchi told reporters on Monday.

�As long as these issues are not settled, one cannot say we have reached an agreement,� said the senior negotiator.

It cannot be said with certainty that parties to the negotiations will arrive at a conclusion by Tuesday, he noted.

�I cannot promise that the [outstanding] issues will be resolved by tonight (Monday) or tomorrow night,� Araqchi further said.

By Press TV