The eyes of the world are on Syria as a ceasefire agreement continues to hold.
The Syrian government and rebels have signed up to deal brokered by the United States and Russia, despite concerns raised by rebels.
Hours before the ceasefire, Syrian President Bashar Assad said he is determined to recover all areas of the country from terrorist groups.
The first aid convoys have begun to enter Syria from Turkey as the US-Russia brokered ceasefire continues to largely hold for a second day.
One convoy with around 20 trucks carrying aid crossed into northern Syria from the Turkish border town of Cilvegozu, according to a Reuters witness.
Turkey had said it aimed, with the United Nations, to send trucks of food, children's clothes and toys to the northern Syrian city of Aleppo.
Meanwhile the Turkish military told Reuters that coalition air strikes killed three Islamic State fighters in Syria on Tuesday.
The strikes targeted four mortar positions and one defensive position around Syrian towns near Aleppo.
The UN's special envoy to Syria said that Bashar Assad's government was preventing life-saving deliveries during a national ceasefire.
The US and Russia have agreed on a cessation of fighting in Syria from 12 September and hope Syrian sides resume diplomatic negotiations.