Two brigades of the Free Syrian army that operate in Raqqah province have joined the Al Nusrah Front for the People of the Levant, one of two official al Qaeda affiliates in Syria.

The Raqqah Revolutionaries Brigade and the God’s Victory Brigade have pledged loyalty to the Al Nusrah Front over the past several days, Reuters reported.

The Raqqah Revolutionaries Brigade is said to have more than 750 fighters in its ranks. The size of the God’s Victory Brigade, which announced its merger with the Al Nusrah Front on Facebook, was not disclosed, but it is said to have “15 battalions.” Battalions often have anywhere from dozens to hundreds of fighters.

The two brigades were part of the Free Syrian Army as recently as Sept. 9. The Raqqah Revolutionaries Brigade and the God’s Victory Brigade, along with two other FSA brigades, formed the Raqqah Military Council over the summer, purportedly…