U.S.-led coalition warplanes struck Islamic State's last stronghold in eastern Syria and hundreds of civilians fled the besieged enclave on Monday as U.S.-backed fighters pressed their campaign to seize it.
Coalition jets roared overhead as columns of white smoke rose from the Islamic State-held Baghouz area a short distance from the Iraqi border, a Reuters witness said.
The Syrian Democratic Forces (SDF), which have driven Islamic State (IS) from swaths of northern and eastern Syria with U.S.-led coalition support, launched an offensive on Saturday to capture the enclave in Deir al-Zor province.