Syrian rights groups on Monday urged an investigation into a video showing a man in military uniform throwing a female fighter's body from a building in Aleppo during recent clashes between government and Kurdish forces.
The government took full control of the city's mostly Kurdish Sheikh Maqsud and Ashrafiyeh neighbourhoods over the weekend after days of fighting, evacuating fighters there to Kurdish-administered areas.
Both sides have traded blame as to who started the deadly clashes, which came as a deal on integrating Kurdish forces into the government has stalled.
In a video circulating on social media since Saturday, a fighter on the second floor of a damaged building is seen throwing a female fighter's body into the street while soldiers nearby shout "Allahu akbar", or God is the greatest.
Some are heard insulting the dead woman, whom the Kurds identified as a member of their internal security forces, saying the incident took place in Sheikh Maqsud.
Rohlat Afrin, head of the Kurds' Women's Protection Units -- part of the US-backed, Kurdish-led Syrian Democratic Forces -- told AFP the woman's name was Deniz and that she had been fighting in the building.
The Syrian Network for Human Rights and the Verify-sy fact-checking platform said they had authenticated the video and that the men were army personnel.
In a statement, the network urged "an immediate, serious and independent investigation", and called for "clear and public military orders... prohibiting any conduct that violates the dignity of the deceased".
Authorities did not immediately respond to an AFP request for comment.
Another video also appears to show a soldier mistreating a fighter's corpse, dragging it down some stairs by a rope around its legs as others hurl insults.
The Kurdish forces identified the dead man as one of their own.
The Syrian Observatory for Human Rights monitor reported "shocking violations and crimes of summary executions and the mutilation of corpses" by government forces in Sheikh Maqsud and Ashrafiyeh, calling for "an independent United Nations commission of inquiry".
Mohammad al-Abdallah, executive director of the Syria Justice and Accountability Centre, said the two incidents caught on film "could amount to war crimes".
The Britain-based Observatory reported 45 civilians and 60 soldiers and fighters from both sides killed during the days of fighting.
Government forces were also accused of abuses against the country's Alawite and Druze minorities during flare-ups of sectarian bloodshed last year.
