Civilians try to enter Turkey illegally at the Bab Al-Salam border crossingThrough Alexander Dziadosz BEIRUT (Reuters) – Six powerful Syrian insurrection groups on Thursday demanded al Qaeda-linked militants and rival insurgents end clashes that have escalated infighting in a strategic northern border space. The al Qaeda-affiliated Islamic State of Iraq and the Levant (ISIL) seized Azaz, about 5 km (three miles) from the frontier with Turkey, last month and has repeatedly clashed with the local Northern Storm brigade seeing that then. A earlier try via riot teams to broker a truce between the two sides failed. …