A Russian Mi-8 helicopter has been shot down by ground fire in Syria following delivery of humanitarian supplies to Aleppo, the Defense Ministry said in a statement. The three crew and two officers from Russia's reconciliation center were returning to base.

The condition of those on board has yet to be established, the ministry said.

"On August 1, an Mi-8 transport helicopter has been shot down by ground fire in Idlib province after a delivery of humanitarian aid to the city of Aleppo. Three crew members and two officers from the Russian Reconciliation Center in Syria were on board," the Defense Ministry said in a statement.

The helicopter was returning to the Russian air base at Khmeimim, the statement added.