More than 120 Syrian security officers were killed in battles with gunmen, state television said, in the first report of large-scale clashes in a revolt against President Bashar Al-Assad.

The report said on Monday armed groups set government buildings ablaze in the northwestern town of Jisr al-Shughour, stole five tonnes of dynamite and were firing at civilians and security forces with machineguns and rocket-propelled grenades.

Wissam Tarif, director of human rights organisation Insan, disputed the official report, saying the clashes were between loyalist troops and army members who had defected. He called the number of deaths 'inconsistent'.

'An army unit or division arrived to the area in the morning. It seems then another unit (in the afternoon) arrived to contain the defection,' Tarif told Reuters. He said several people in Jisr al-Shoghour had confirmed that version of events.

Opposition activists said earlier that forces had launched a security operation in the town on Saturday and at least 37 residents and 10 police had been killed. It was impossible to verify the conflicting accounts as authorities have prevented most international media from operating in Syria.

'The security forces have managed to end a blockade of one of the neighbourhoods that was seized by the gunmen for awhile and are now battling them to end the blockade of the other neighbourhoods,' the television said.

'The gunmen mutilated some of the bodies and threw some into the river. The people in Jisr al-Shughour are urging the army to intervene speedily,' it said.

Interior Minister Mohammad Ibrahim al-Shaar said authorities would respond firmly to armed attacks and Information Minister Adnan Mahmoud said the army, which has so far stayed out of the town, 'will carry out their national duty to restore security'. Rights groups say 1,000 civilians have been killed in protests against the president which have swept from the southern city of Deraa to the Mediterranean coast and eastern Kurdish regions.

French Foreign Minister Alain Juppe said France was ready to ask the UN Security Council to vote on a draft resolution condemning Syria for its crackdown despite the threat that Russia would veto the measure.

'The situation is very clear. In Syria, the process of reform is dead and we think that Bashar has lost his legitimacy to rule the country,' Juppe said in Washington on Monday.

'We'll see what the Russians will do. If they veto, they will take their responsibility. Maybe if they see that there are 11 votes in favour of the resolution, they will change their mind. So there is a risk to take and we're ready to take it.'

Amnesty International urged the Security Council to refer Syria to the International Criminal Court.  - Reuters