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

…Up to 4,000 militants are believed to be holed up inside Raqqa, including foreign fighters and various senior figures.
It is unclear how many civilians are trapped there with them, but UN officials estimated that there are between 50,000 and 100,000.

Raqqa battle: ‘Staggering’ civilian toll in strikes on IS – BBC News

Sigh….