Al-Qaeda's Syrian affiliate the Nusra Front has freed several members of a US-trained rebel force that it kidnapped two weeks ago, the Western-backed unit said in a statement, according to AFP.

"Seven Division 30 fighters who were being held by the brothers in Al-Nusra Front have been freed," a statement stamped by the unit said. "We welcome this noble initiative and urge the brothers of Al-Nusra and hope that they will release in the coming hours the group's commander and other fighters." 

It did not specify where the releases took place. All the kidnaps occurred in northern Syria.