More than 60,000 people have died in Syria's armed conflict, the United Nations said on Wednesday, Jan 2, according to Reuters.

In the latest violence, dozens were killed in a rebellious Damascus suburb when a government air strike turned a petrol station into an inferno, incinerating drivers who had rushed there for a rare chance to fill their tanks, activists said.

UN Human Rights Commissioner Navi Pillay said in Geneva that researchers cross-referencing seven sources over five months of analysis had listed 59,648 people killed in Syria between March 15, 2011 and November 30, 2012.

"The number of casualties is much higher than we expected and is truly shocking," she said. "Given that there has been no let-up in the conflict since the end of November, we can assume that more than 60,000 people have been killed by the beginning of 2013."

There was no breakdown by ethnicity or information about whether the dead were rebels, soldiers or civilians. There was also no estimate of an upper limit of the possible toll.

Previously, the opposition-linked Syrian Observatory for Human Rights monitoring group had put the toll at around 45,000 confirmed dead but said the real number was likely to be higher.