AMMAN, Jordan -- Clashes erupted Friday between groups nominally united in their opposition to the Syrian government, with rebel fighters in the north attacking an Al Qaeda-linked group that has increasingly fought against them.
The combat comes as the opposition movements seeking to oust President Bashar Assad find themselves increasingly fractured.
The fighting began early Friday when the Al Qaeda-linked Islamic State of Iraq and Syria, or ISIS, tried to seize Atarib, a town near Aleppo held by other rebels, in order to capture the former base of the government's 46th Regiment and the courthouse, the rebels and activists said.