Stephane Dujarric, spokesman for UN chief Antonio Guterres, says the world body is trying to “get a better understanding of what is official and what is not official”, amid reports that an MoU has been reached between Tehran and Washington, Al Jazeera reports.

Dujarric told reporters that the UN is “very worried and concerned” about exchanges of fire between the two countries this week.

“We encourage both parties to respect the ceasefire that they had announced,” he states.