The Russian military said Friday its officers have found evidence of chemical weapons use by Syrian militants in the northern area of Aleppo where government forces are trying to regain control of areas they recently lost to insurgents.
Russian Defense Ministry spokesman Maj. Gen. Igor Konashenkov said that ministry experts have found unexploded ordnance and fragments of munitions containing chlorine and white phosphorus on Aleppo's southwestern outskirts. Konashenkov said the discovery proves the militants have used chemical weapons against civilians and Syrian army soldiers.
The announcement comes as the Syrian government and Russia appear to be preparing for an all-out offensive on the besieged eastern parts of Aleppo that are held by opposition fighters. Pro-Syrian media outlets in Lebanon have been reporting that heavy reinforcements have been arriving in Aleppo over the past weeks in preparation for the attack.
The Interfax news agency reported Friday that jets from the Russian aircraft carrier Admiral Kuznetsov have been flying over Syria over the past few days to survey the area in preparation for future combat missions. It said that preparations are underway for the carrier and escorting ships to launch strikes against militants.
The U.S. and its allies have pushed for sanctions on the Syrian government for using chemical weapons. Russia has questioned international investigators' conclusions linking chemical weapons use to the Syrian government and pointed at evidence of their use by the militants.
The U.N. Security Council has voted to extend the mandate of inspectors working to determine those responsible for chemical weapons attacks in Syria.
Aleppo, Syria's largest city and once commercial capital, has been the center of violence in recent months where government forces have besieged eastern rebel-held neighborhoods.
The insurgents had seized a couple of strategic areas in western Aleppo since they launched an offensive on government-held parts of Aleppo on Oct. 28 in an attempt to break the siege imposed on areas they have controlled since July. The siege on eastern Aleppo was coupled with a punishing bombing campaign by Syrian aircraft and supported by Russia, which has been backing the government of President Bashar Assad. Since late October, Russia said it would halt the airstrikes, amid rising civilian casualties, urging rebels to leave the territory.
Syrian troops launched a counteroffensive capturing much of the southwestern areas they lost as well as parts of Al-Assad district west of the city.
The Britain-based Syrian Observatory for Human Rights said warplanes carried out dozens of airstrikes on the western edge of Aleppo and nearby villages. It added that government forces are trying to regain control of the remaining parts of Al-Assad district that are still under rebel control.
The Aleppo Media Center, an activist collective, also reported intense airstrikes on Al-Assad district as well as an airstrike on the nearby village of Kfar Dael, saying it left dozens of people killed or wounded.
On Thursday, Jan Egeland, the special adviser to the U.N. envoy for Syria, said the last food rations in besieged eastern Aleppo will run out by next week. Speaking in Geneva, Egeland said the last time the over a quarter of million people inside east Aleppo received any humanitarian aid was in the beginning of July.