ISTANBUL — Syria’s military declared the end of a nationwide cease-fire Monday, blaming rebel groups for violating the truce and dealing a blow to U.S. and Russian efforts to halt the bloodshed.
Government forces immediately began shelling the rebel-held part of Aleppo, which has been under siege for more than a month. Airstrikes and barrel bombs pummeled the city, and activists said an aid convoy in the nearby countryside was also hit.
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