A man inspects a destroyed house in Bab-Todmor in Homs.

Damascus -

Syrian troops with tanks and helicopters slaughtered more than 150 people in a central village, rights activists said on Friday, prompting the opposition to call for urgent UN intervention.

Reports of the massacre came after UN Security Council ambassadors held their first talks on rival Russian and Western draft resolutions on Syria, with Moscow spurning calls for sanctions against President Bashar al-Assad's regime.

No progress was reported, with a July 20 deadline looming. That is the end date of the mandate for a UN observer mission to Syria, where activists say more than 17 000 people have died since March 2011.

The Syrian Observatory for Human Rights said government troops had on Thursday massacred more than 150 people in Treimsa village, while a rebel leader put the toll at more than 200.

If confirmed, the killing at Treimsa in the central province of Hama would rival the massacre at Houla on May 25, when a pro-Assad militia and government forces were accused of killing at least 108 people.

Observatory director Rami Abdel Rahman said the bodies of 30 villagers had been identified after the sustained attack, which brought Thursday's total death toll across Syria to well over 200.

“Some are estimating higher numbers, but even at around 150, especially considering how small the town is, this might be the biggest massacre committed in Syria since the start of the revolution,” he told AFP.

“The army must have got the green light to commit a massacre of this scale, and I bear President Bashar al-Assad responsible for the killing.”

The Syrian National Council, the main opposition alliance, urged the Security Council to pass a binding resolution against Assad's regime.

“To stop this bloody madness which threatens the entity of Syria, as well as peace and the security in the region and in the world, requires an urgent and sharp resolution of the Security Council under Chapter VII (of the UN Charter) which protects the Syrian people,” it said.

Chapter VII allows for punitive measures against regimes considered a threat to the peace, including economic sanctions and military intervention.

Syria meanwhile accused the media and “terrorists” of staging the massacre in a bid to trigger UN-backed intervention.

“The bloodthirsty media in collaboration with gangs of armed terrorists massacred residents of Treimsa village ... to sway public opinion against Syria and its people and provoke international intervention on the eve of a UN Security Council meeting,” state-run news agency SANA said.

Rebel leader Abu Mohamad, chief of a group based further to the north of Treimsa, said the attack using helicopters, tanks and multiple rocket-launchers had killed more than 200 people in the village.

Abu Mohamad said he had been in phone contact with a resident of Treimsa who told him government forces were on hills a few kilometres (miles) outside the town.

The army and the shabiha, pro-regime militia who are said to accompany troops to make sure they do not desert, started to bombard Treimsa about 11.00am (08.00 GMT) and finished around 9.00pm, according to Abu Mohamad.

But a Hama-based activist who identified himself as Abu Ghazi said regime troops started shelling the village at about 6:00 am.

“That was followed by clashes with the (rebel) Free Syrian Army, but the FSA does not have a big presence in Treimsa and could not fight long,” said the activist.

“The number of martyrs is very high partly because the army shelled a mosque where scores of people had taken shelter, to treat the wounded and hide from the bombs.”

The village, which had a population of 7 000, he said, “is empty now. Everyone is dead or has run away.”

“Almost 30 army vehicles arrived, and surrounded the village completely. There wasn't a single way out,” said Ibrahim, another activist from Treimsa. “Anyone who tried to escape through the fields was shot.”

Pro-regime militiamen from nearby Alawite villages entered Treimsa after the army assault, Ibrahim said via Skype. “After the shelling, the army came in with light weapons, and the shabiha followed, armed with knives.”

Clashes inside the besieged village were vicious, he said, noting that “whole families were killed. There was a real street war for several hours.”

Treimsa is located near Al-Kubeir, where at least 55 people were killed on July 6, according to the Observatory. Like Al-Kubeir, Treimsa is a majority Sunni village situated near Alawite ones.

President Assad belongs to the Alawite community - an offshoot of Shi'a Islam - although the vast majority of Syrians are Sunni.

Protests broke out across Syria to protest the latest killings in Treimsa, according to amateur videos posted on YouTube by activists.

In New York, the UN Security Council wrangled over a resolution on the future of the troubled UN mission in Syria.

Russia and the Western powers have proposed rival resolutions on renewing the UN mission in Syria and securing the implementation of the peace plan of UN-Arab League envoy Kofi Annan.

Annan will on Monday meet Russian Foreign Minister Sergei Lavrov about the crisis and “the chances of an internal Syrian solution,” ITAR-TASS news agency said, in a report confirmed by the peace envoy's office in Geneva.

Syria's Muslim Brotherhood said Annan as well as Assad allies Iran and Russia must through their inaction shoulder the blame for the latest massacre.

The Security Council must hold a vote before the mandate of the UN Supervision Mission in Syria, or UNSMIS, runs out next week. - Sapa-AFP