The blast left burned bodies and damaged vehicles scattered near a mosque where relatives had gathered in a tent for the funeral of a local sheikh, witnesses said.

“Suddenly the place turned into hell,” said Haider Qahtan, 37, whose hand was injured in the blast. “All my relatives were cut down and their bodies were burned.”

Police officials at the scene put the death toll at 18 at least, with a further 63 people wounded.