A car bomb blamed on a radical group linked to al Qaeda killed at least 26 people in a rebel-held city of northern Syria on Wednesday, an opposition monitoring group said.

Hours earlier, a Belgian commander from the same Al Qaeda-linked group, the Islamic State of Iraq and the Levant (ISIL), was reported killed in northern Syria. ISIL supporters denied the death.

An array of Syrian rebel groups, including the large alliance known as the Islamic Front, have been trying to push out ISIL, a small but powerful affiliate of al Qaeda with a core of foreign fighters. […]