Russia said on Sunday it had reached an agreement with the United States to improve coordination between their military operations in Syria, where they are backing opposing sides of a civil war and launching air strikes. Russia’s defence ministry said it was pushing Washington to help produce a shared map of the positions of fighting forces to avoid incidents, a day after Washington accused Moscow of attacking US-backed insurgents there. Moscow’s intervention on the side of President Bashar Assad, alongside Western backing for rebel groups opposing him, has raised fears of a wider international confrontation in the war. Russia’s defence ministry said military officials from both countries had agreed on the need to improve coordination during a video conference. There was no immediate confirmation from Washington.