DAMASCUS  - Rebels said they shot down a MiG warplane on Thursday as violence whipped across Syria ahead of a UN Security Council meeting on deteriorating humanitarian conditions in the country and along its borders.

“A MiG was shot down this morning by our men using automatic weapons, shortly after taking off from Abu Zohur military airport in Idlib province,” the rebel Free Syrian Army chief for the northern province, Colonel Afif Mahmoud Suleiman, told AFP.

The Britain-based Syrian Observatory for Human Rights said regime forces retaliated by shelling the area, and that eight children and nine women were among at least 20 people killed.

The opposition Syrian National Council, meanwhile, renewed its call for the Security Council to impose no-fly zones.

Accusing the government of “crimes” and “barbaric acts,” the SNC said a no-fly zone and corridors were essential to protect almost 2.5 million civilians displaced by the conflict or who fled across the borders with Syria’s neighbours.

Thursday’s UN Security Council meeting was called by France and aimed at “appealing to world conscience and for mobilisation” in the face of the Syrian humanitarian drama, a diplomat said in New York.

Turkey has floated the idea of creating buffer zones within Syria to receive those displaced by the conflict so they do not flood across the borders into neighbouring countries.

Assad, however, dismissed the idea in an interview on Wednesday with the pro-regime Addounia TV channel.

“Talk of buffer zones firstly is not on the table and secondly it is an unrealistic idea by hostile countries and the enemies of Syria,” the embattled leader said. Syria’s neighbours Jordan, Lebanon, Turkey and Iraq were all to send ministers to the meeting. On the warfront, fierce clashes broke out near a military security headquarters in Deir Ezzor city of east Syria, while in the northern city of Aleppo, the Salaheddin, Saif al-Dawla and Sukari districts saw renewed fighting, the Observatory said.

In Damascus, gunfire reverberated across Qaboon and fighting also erupted in the southern area of Tadamun, according to activist groups.

The Britain-based Observatory reported a total of at least 77 people killed in violence across the country on Thursday, including 46 civilians, four of whom died in the city of Aleppo.

The director of the capital’s Tishrin military hospital, meanwhile, said more than 8,000 members of the security forces have been killed since the uprising against Assad’s rule broke out in March 2011.

The Observatory, which says more than 25,000 people have been killed in the 17-month-old uprising, puts the figure of soldiers and members of the security forces killed at nearly 6,500.