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 Syrian Observatory for Human Rights said major conflict zones in Syria were calm after a week-long ceasefire took effect on Monday.
However it did report that there has been some shelling by both rebel and government forces in the southwest of the country.
Meanwhile the Russian Foreign Ministry said it was concerned that some armed opposition groups, including the powerful insurgent group Ahrar al-Sham, are refusing to abide by the ceasefire.
The ministry also said in a statement that it was counting on the US to influence Syria's "moderate opposition" to ensure full compliance with the cessation of hostilities.
It also said humanitarian aid to Aleppo would begin immediately through the northern road of Castello.
A southern road through the region of Ramusa will open "over time."
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.