UN Security Council to meet on Syria

The bombing came after the Syrian army announced overnight that it was launching an operation to recapture the rebel-held sector of the city.

"Since the announcement two days ago by the Assad regime of an offensive to capture eastern Aleppo, there have been repeated reports of airstrikes involving the use of incendiary weapons and advanced munitions such as bunker buster bombs", United Nations spokesman Stephane Dujarric said in a statement.

Western countries and worldwide aid organisations said they feared for the lives of more than 250,000 civilians believed to be trapped in the rebel-held zone of Aleppo, Syria's biggest city, which has been divided into opposition and Government sectors for years.

Medical sources said at least 91 persons were killed in Friday's bombardment. "Any truce, seven days, three days would be senseless", he said, adding that in any case the US -led coalition had proved its inability to control rebels.

On the sidelines of the meeting, U.N. Secretary-General Ban Ki-moon urged an end to the offensive saying the bombs "are not busting bunkers, they are demolishing ordinary people looking for any last refuge of safety".

The strike has erupted in a diplomatic row between the United States and Russian Federation, the brokers of the ceasefire.

Activists say allied Russian forces have also participated in the strikes, though Moscow has not confirmed its involvement.

The Thursday talks broke up after Russian Federation refused U.S. demands that it promise to immediately ground the Syrian regime's air force. The two powers accuse each other of failing to rein in their respective allies on the ground.

For days, videos and photographs from eastern Aleppo have shown flattened buildings and paramedics pulling bodies from the rubble. For hours Thursday, the teams searched to save civilians who were buried under rubble in several neighborhoods in rebel-held Aleppo.

Ms Singer said the Suleiman al-Halabi pumping station, also located in the rebel-held east, was then switched off in retaliation - cutting water to 1.5 million people in government-held western parts of the city.

The Al Jazeera news agency tweeted that its bureau in the city had been partly destroyed.

Fresh strikes were reported in the city on Saturday, as the Syrian army pressed on with its push to retake rebel areas.

After the air assault, the military says ground troops will move in.

The Syrian army said the operation would include a ground attack, and could last "for some time".

Aleppo, Syria's largest city, has been the scene of some of the six-year-long conflict's fiercest fighting.

A three-day period of calm would go into effect, accompanied by Syrian and Russian planes leaving the skies over northern Syria, according to a concept that Secretary of State John Kerry and Russian Foreign Minister Sergey Lavrov developed late Wednesday night. Activists reported dozens of airstrikes on Friday alone.

Thursday night's meeting in NY brought together members of the International Syria Support Group, which includes the US, Russia and other powers.

United Nations peace envoy Staffan de Mistura said Thursday's failed talks were "long, painful and disappointing" and warned of escalating violence.

Mr Kerry met Mr Lavrov again on Friday and said there had been "a little bit of progress" on resolving differences.

Sep 24, 2016- U.S. and Russian plans to end Syria's conflict must be saved as there is no alternative, Russia's Foreign Minister Sergei Lavrov has told the UN.

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