Syria has agreed to a 10 April deadline to begin implementing a six-point peace plan, UN-Arab League envoy Kofi Annan has said, according to diplomats. The plan calls for a UN-supervised ceasefire by all parties, withdrawal of soldiers and heavy weapons from cities, and delivery of humanitarian aid. Mr Annan was briefing the UN Security Council in closed session. Violence in Syria continued on Monday, with activists reporting fighting in Idlib and Homs. Meanwhile, the head of the International Committee of the Red Cross (ICRC), Jakob Kellenberger, is on his way to Damascus for talks about expanding aid operations and gaining access to all detainees. During his two-day visit, Mr Kellenberger plans to visit areas affected during the fighting, the ICRC said in a statement. He will also push the ICRC's proposal for a daily two-hour ceasefire to allow aid to be delivered and the wounded to be evacuated. Mr Annan has asked the Security Council for its backing of next Tuesday's deadline for Syria to partially implement his peace plan, with a full ceasefire within 48 hours. Syria said last week it accepted the peace plan. However, Mr Annan cautioned the Security Council that so far there was no sign of President Bashar al-Assad's government keeping its promises on implementation, diplomats said.