Beirut: A suicide bomber attacked Turkish-backed rebels just outside the Syrian town of Al-Bab on Friday, killing 42 people and injured dozens more sources said.
The bomber blew up a vehicle packed with explosives outside a rebel command centre in the village of Susian.
The blast devastated the twin command posts and also seriously wounded a large number of fighters, sources said. Most of the dead were fighters.
There was no immediate claim for the attack.