Raqqa battle: "Staggering" civilian toll in strikes on ISIS

Hundreds of civilians are reported to have been killed since March, as coalition warplanes support an offensive by a Kurdish-led alliance.

In the past week, Syrian Democratic Forces (SDF) fighters have pushed into the west, east and north of Raqqa.

The battle for the city has also led to 160,000 civilians fleeing their homes.

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