BEIRUT: Violence in Syria has killed at least 33,082 people, most of them civilians, the Syrian Observatory for Human Rights monitoring group said on Saturday.

Some 1,000 people have been killed in the past five days alone, activists said.

"This is all-out war -- there is no other way to describe the violence in Syria," Observatory director Rami Abdel Rahman told AFP.

At least 23,630 civilians have been killed, along with 8,211 soldiers and 1,241 army defectors who joined the insurgency against President Bashar al-Assad.

The Observatory's civilian toll also includes non-military defectors who took up arms against the regime.

"If the conflict ends and a full assessment is carried out on the ground, the toll may well turn out to be higher," Abdel Rahman said.

His group's tallies do not count the many unidentified victims of the bloody conflict, nor do they include thousands of people missing and thought to be in detention.

They also exclude thousands of pro-regime militiamen, Abdel Rahman said.

The Observatory relies on a network of activists, lawyers and medics on the ground inside Syria for its information.

Syria's revolt began in March last year as pro-reform protests but morphed into an armed insurgency when demonstrations were brutally crushed.

Most rebels, like the population, are Sunni Muslims in a country dominated by a minority regime of Alawites, an offshoot of Shiite Islam.