The fighting in Syria --- it isn't just between rebels and the government. These rebels are linked to al Qaeda and they've been spent the past two days battling more moderate fighters, the Northern Storm brigade in the town of Azaz, on the Turkish border.

Five Northern Storm fighters have been killed in the past few days --- On Friday --- the groups agreed to a ceasefire --- signing their names and promising to release prisoners. They've also resolved to refer their dispute to a rebel court.

Internal clashes underscore divisions among groups seeking to overthrow President Bashar al-Assad. They've also compounded the complications for western powers seeking to end the country's 2-1/2 year conflict.