BAGHDAD - A suicide car bomber struck a major bridge in Iraq’s volatile Diyala province on Monday, police said, cutting the span over the Diyala River. Police said they did not know if there were any casualties. The bridge, normally guarded by Georgian troops, links the provincial capital Baquba with villages in the north of Diyala. No other details were immediately available.Three US soldiers were killed and another six wounded when a suicide car bomber attacked a checkpoint near a bridge spanning a major north-south artery south of Baghdad on Sunday. The explosion near Mahmudiya, in the notorious ‘triangle of death’ area, brought down part of the bridge.