The United States is close to suspending talks with Russia on a ceasefire in Syria, U.S. Secretary of State John Kerry said on Thursday, as the Kremlin vowed to press on with an assault on the city of Aleppo.
Moscow and Damascus launched a campaign to recapture the rebel-held sector of Syria's biggest city this month, abandoning a ceasefire a week after it took effect to embark on what could be the biggest battle of a nearly six-year war.
Syrian government forces made a significant advance, capturing the Handarat refugee camp a few kilometers (miles) north of the city. They had briefly seized it on Saturday, before losing it again in a rebel counter attack.