Iran has suspended talks with regional rival Saudi Arabia, a website affiliated to Iran's top security body reported on Sunday, without giving a reason for the decision that comes as a fifth round of negotiations was due to start this week.
Tehran also condemned mass executions in Saudi Arabia that activists said included 41 Shi'ite Muslims. Meanwhile talks on an Iranian nuclear deal in Vienna have stalled.
"Iran has unilaterally suspended talks with Saudi Arabia," Nor News said, without providing a reason. It said no specific date had been scheduled for a new round of talks.
The Saudi government media office CIRC did not immediately respond to a Reuters request for comment.
Sunni Muslim Saudi Arabia and Shi'ite Iran, which are locked in proxy conflicts around the region, started direct talks last year to try to contain tensions. Iraq's foreign minister said on Saturday his country would host a new round on Wednesday.
