Syria's chief negotiator at UN-sponsored talks in Geneva demanded Saturday that all opposition parties at the talks condemn the deadly assault in Homs, saying otherwise Damascus will consider them as "accomplices of terrorism".

"Any party who refuses to condemn these attacks today we will consider that party to be an accomplice of terrorism," Bashar al-Jaafari said after his latest meeting with UN mediator Staffan de Mistura, who he said should also condemn the attacks.