More than 3,500 people have died in months of anti-government protests in Syria, according to the UN.
A UN spokeswoman blamed "the brutal crackdown on dissent" for the figure, which was based on sources on the ground.
Last week the Arab League said Syria had agreed to pull its forces off the street in a peace deal.
But since then, the UN says more than 60 people have been reported killed - many in the central city of Homs.'We will keep protesting'
"Syrian troops continue to use tanks and heavy weaponry to attack residential areas in the city of Homs," said Ravina Shamdasani, spokeswoman for the Office of the UN High Commissioner for Human Rights (OHCHR).
Opposition activists say security forces have been mounting a heavy offensive on the city over the past few days, particularly on the contested Baba Amr district