UN votes to extend Syria observer mission

However, members agreed the mission could be extended further if the use of heavy weapons ends and fighting eases.

The observers - sent to oversee a ceasefire that never took hold - have suspended their work in the face of escalating violence.

With fighting now engulfing areas of Damascus, thousands of Syrians are fleeing into neighbouring countries.

Government forces in the capital are reported to have launched all-out attacks on rebel strongholds.

They have retaken the Midan district and are believed to have launched an assault on the eastern Jubar area.

As President Bashar al-Assad redeploys troops to quell a growing uprising in the capital, rebels have struck at other targets around the country.

On Thursday rebel fighters took control of crossings on Syria's Iraq and Turkey borders.

And on Friday, fierce fighting broke out in Syria's second city of Aleppo, activists said.

The latest violence comes after an attack on Wednesday that killed four senior members of the regime, including national security chief Hisham Ikhtiar, who died from his injuries on Friday.

'Final extension'

The UN vote came after hours of intense negotiations among security council members.

Russia had threatened to veto the UK-drafted resolution, but Moscow's ambassador Vitaly Churkin finally backed a revised text.

The resolution will end the observer mission in 30 days. The mandate could then be renewed, but only if Secretary General Ban Ki-moon and the Security Council are able to confirm that both sides are abiding by the terms of the UN-backed ceasefire plan.

Britain's UN ambassador, Mark Lyall Grant, said after the vote: "We have said clearly that it is a final extension unless there is a change in the dynamic on the ground, and in particular that there should be a cessation of use of heavy weapons and that there should be a sufficient reduction in the violence to enable UNSMIS [the observer mission] to carry out its mandate."

US ambassador Susan Rice said it was "unlikely" that the violence in Syria would ease enough to allow a continued UN presence.

She said that Washington's "strong preference" would be for a resolution involving sanctions.

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