A ceasefire in Syria was holding Thursday, despite a limited number of reported breaches, but humanitarian aid supplies have not yet entered the country and are being held up on the border with Turkey.
The Syrian Observatory for Human Rights said despite the cessation of hostilities - in effect since Monday night - there was no sign of trucks entering Syria.
UN Secretary General Ban Ki-moon said some 20 trucks are waiting on the border with Turkey. Hundreds of thousands of Syrians remain in besieged or hard-to-reach areas of the country.
"A lot of people are dying from poverty and disease and because of lack of sanitary support," said Ban, urging for security measures to be put in place to ensure the safety of those delivering aid.
The Syrian government opposes aid entering the country without its permission while rebels are demanding that aid not pass through certain areas under the control of forces loyal to President Bashar al-Assad.