Russian Army today denied presence of children in a school in Syria's Idlib province where 28 people were killed in an airstrike last month. The Army's spokesman said in a statement that there is no proof, even indirect, that children were present in the building.<br/><br/>UN Secretary-General Ban Ki-moon said, the attack on the school in the rebel-held province could amount to a war crime and urged a thorough investigation. Yesterday, Human Rights Watch repeated the war crime accusation.<br/><br/>Moscow has been conducting a bombing campaign in Syria in support of long-time ally Syrian leader Bashar al-Assad since September 2015. More than 3 lakh people have been killed since Syria's war devolved from a widespread protest movement against Assad's rule in March 2011 to a multi-front war between rebels, jihadists, Kurds and regime forces.