This unverified footage from the White Helmets shows rescuers pulling a girl from the rubble of a shelled-out building in Syria's Idlib. It is unknown if the girl in the video survived.

Recent government shelling of the rebel-held area killed four people, rights groups said. Rebel-held northwestern Syria is home to some 4 million people. 

Idlib province is the last major rebel stronghold in the war-torn country.

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