The son of late Chechen warlord Ruslan Gelayev has been killed in Syria by regime forces, according to Russian news reports.
However, the details of how and where Rustam Gelayev, 24, died differ.
Chechenews.com claims Mr Gelayev was killed earlier this month during the shelling of an Aleppo mosque after he joined a unit of volunteers fighting alongside the insurgents.
Kavkazcenter.com reported Mr Gelayev died when his unit "entered into a battle with superior forces of the Alawite regime".
However, Russian newspaper Kommersant, citing a relative, said Mr Gelayev had been studying in Syria when he decided to leave because of the violence. He was on his to Turkey when he was killed, according to the report.
Syrian forces backed by tanks have stormed Daraya, on the outskirts of Damascus, after 24 hours of artillery and helicopter bombardment to drive out rebels, opposition sources have told Reuters.
The bombardment killed at least 15 people and wounded 150 in Daraya, situated on the southwest edge of Damascus, the sources said.
Troops were conducting house to house raids in the conservative Sunni Muslim town and making their way to the town's centre, meeting light resistance from rebels who appear to have largely withdrawn from the area, activists in Damascus said.
The report was the result of a 10-day visit to the Syrian city of Aleppo by Amnesty in early August. During that time Amnesty investigated attacks in which many civilians not involved in the violence were killed or injured.
Amnesty also found that bread shortages in Aleppo had left queues of people, including children outside of bakeries day and night, the report documents how civilians have been killed or injured while queuing for bread.
"Scores of civilians not involved in the conflict, many of them children, have been killed and many more injured, in recent weeks as a result of air strikes and artillery and mortar attacks by government forces against residential neighbourhoods.
Some of the victims died in the very places where they had sought shelter, having been forced to flee their homes due to the fighting."