U.S. Secretary of State John Kerry defended his efforts to negotiate with Moscow over the war in Syria on Monday, despite the collapse of a ceasefire that has led to a massive Russian-backed assault on the besieged rebel-held sector of Aleppo.
Medical supplies were running out in eastern Aleppo, with victims pouring into barely functioning hospitals as Russia and its ally President Bashar al-Assad ignored Western pleas to stop the bombing of the last major urban area in opposition hands.
Moscow and Damascus launched their assault last week despite months of negotiations led by Kerry that resulted in a short-lived ceasefire this month. The secretary of state's diplomatic overtures to Moscow had faced scepticism, including from other senior officials within the U.S. administration.
Kerry said his failed ceasefire was not the cause of the fighting, and the only way to stop the war was to talk. He lashed back at critics, including Republican senator John McCain, who described him last week as "intrepid but delusional" for putting too much faith in Russia.
The Syrian government offensive to recapture all of Aleppo, with Russian air support and Iranian help on the ground, has been accompanied by bombing that residents describe as unprecedented in its ferocity. Some 250,000 civilians remain trapped in the besieged, opposition-held sector of Syria's biggest city. Hundreds of people, including dozens of children, have been reported killed since Thursday night by an onslaught that includes bunker-busting bombs that bring down whole buildings.
Russia and Assad appear to have abandoned diplomacy last week, betting instead on delivering a decisive military blow against the president's enemies on the battlefield. Capturing rebel districts of Aleppo would be the biggest victory of the war so far for Assad, crushing the revolt in its last major urban stronghold.
