An international mediator said Wednesday that the Syrian government has agreed to a ceasefire during the Muslim holiday Eid ul-Adha, which starts on Thursday. Lakdar Brahimi said some Syrian rebel groups had agreed to the truce in principal. Meanwhile, a senior Russian general said the Syrian rebels have U.S.-made weapons, including surface-to-air missiles. Russia is the biggest supplier of arms to Syrian President Bashar al-Assad’s regime. Syrian artillery gunners on Tuesday shelled a packed bakery in Aleppo, killing at least 20 and wounding more than 30.