Updated

An Iraqi official says the country has forced an Iranian plane headed to Syria to land in Baghdad so authorities could search it for arms. It's the third inspection in as many days.

Ali al-Moussawi says no weapons were found on the 747 cargo flight Wednesday. It made checks of Syria-bound Iranian flights the two previous days, saying no weapons were discovered.

Iraq is under pressure from Washington to do more to prevent its airspace from being used as a possible conduit for Iranian arms to Tehran's ally, Syrian President Bashar Assad.

Baghdad last week vowed to conduct more searches of vehicles on land and aircraft in its airspace. Officials have repeatedly said they will not allow Iraqi territory to be used for weapons to either side in Syria's conflict.