Free Syrian Army fighters take cover inside a house near the air force intelligence headquarters in Aleppo, Syria, August 1, 2013.
United Nations human rights chief Navi Pillay is calling for an independent investigation into war crimes allegedly committed by Syrian rebel fighters.
Pillay said Friday that a U.N. team in Syria found evidence that rebels executed at least 30 people last month in Aleppo. Most of the victims were Syrian soldiers. She said the killings were captured on video, calling the incident "deeply shocking."
Pillay said those on both sides of the war who break international humanitarian and human rights law need to be held accountable. She said rebel forces should not think they are immune from prosecution.
The U.N. says more than two years of civil war in Syria has killed more than 100,000 people and driven about 6 million from their homes. Most of the victims have been civilians.
The Latest Images from Syria
1/13Syria's President Bashar al-Assad shakes hands with military personnel during his visit to a military site at Darya area on the 68th anniversary of army day, August 1, 2013.
2/13An injured youth at a vegetable market hit by what activists said was shelling by forces loyal to Syria's President Bashar al-Assad at al-Mashhad district in Aleppo, July 31, 2013.
3/13A Free Syrian Army fighter sits on a sofa along a street in Aleppo's Salaheddine neighborhood, July 31, 2013
4/13Syrians refugees try to enter a truck which will transport them back to their homeland at the Al-Zaatri refugee camp in the Jordanian city of Mafraq, near the border with Syria, July 30, 2013.
5/13A Syrian refugee displays sweets for sale during the month of Ramadan at Al Zaatri refugee camp in the Jordanian city of Mafraq, near the border with Syria, July 30, 2013.
6/13Syrians refugees try to enter a truck which will transport them back to their homeland at the Al-Zaatri refugee camp, Mafraq, near the border with Syria, July 30, 2013.
7/13Free Syrian Army fighters take up position on the stairs of a building in Aleppo's Salaheddine neighborhood, July 23, 2013.
8/13A man points towards a burning car, caused by what activists said was shelling by forces loyal to Syria's President Bashar al-Assad, Damascus, July 23, 2013.
9/13In this image taken from video from the Shaam News Network, fighters from the Free Syrian Army target regime forces in Aleppo, Syria, July 22, 2013.
10/13In this image taken from video obtained from the Shaam News Network, columns of smoke billow after heavy bombing, in the countryside outside of Aleppo, Syria, July 22, 2013.
11/13Members of the Free Syrian Army are seen through smoke as they walks along a damaged street filled with debris in Deir al-Zor, Syria, July 22, 2013.
12/13Free Syrian Army fighters take their positions in a room as they try to locate snipers in Aleppo's Salaheddine neighborhood, July 21, 2013.
13/13Free Syrian Army fighters eat their iftar meal as they break fast, in Aleppo's Karm al-Jabal neighborhood, July 21, 2013.
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