Bomb kills eight in Syrian city of Raqqa
A bomb attack in the Syrian city of Raqqa killed at least eight people on Tuesday, including four fighters of the U.S.-backed Syrian Democratic Forces, a security source in northern Syria said .
The blast also killed four civilians and wounded three members of the Kurdish-led internal security forces known as the Asayish, the source said.
Witnesses said people including SDF members gathered at the scene after an initial blast, which was followed by a bigger explosion that caused the casualties.
