Referencing a March 19 attack ( not the one on August 21 ) in an Aleppo suburb , the ministry said its experts -- in an analysis requested by Syrian authorities -- concluded that 26 civilian and Syrian military deaths from the spring attack can be traced to a `` homemade '' device not used by the Syrian army . NEW : An opposition group claims 72 deaths ; Russian news says ` ` terrorists '' targeted . Syria : Syrian official says ` ` those who lead the aggression '' will pay the price . Russia 's government links a rebel group to March chemical attack in Syria . Russian government says the evidence for a U.N.-backed strike should be undeniable .
NEW : An opposition group claims 72 deaths ; Russian news says ` ` terrorists '' targeted . Syria : Syrian official says ` ` those who lead the aggression '' will pay the price . Russia 's government links a rebel group to March chemical attack in Syria . Russian government says the evidence for a U.N.-backed strike should be undeniable .