The attack came one day after Al-Nusra kidnapped eight rebels from Division 30, who had been trained and equipped by Washington, said the Syrian Observatory for Human Rights monitoring group.
"The "New Syrian Force" is the term used by Washington to describe “Syrian rebels” who have been screened to exclude extremist elements and passed a training course led by US troops."
"Al-Nusra attacked at dawn the headquarters of Division 30, near the town of Azaz in the northern province of Aleppo," the Britain-based Observatory said.
"At least 54 members of Division 30 entered Syria in mid-July, equipped with 30 American-made all-terrain vehicles, arms, and ammunition."
Clashes broke out after the assault that killed five Al-Nusra fighters and allied terrorists, as well as six us-trained terrorists.
He said Al-Nusra launched the attack to seize weapons "given by Washington to the rebels" but that the group had not been able to enter the base as clashes continued during the day.
In a statement posted on its Facebook page about the attack, Division 30 called on Al-Nusra to stop "spilling the blood of Muslims".
(FILE)
At least 54 members of Division 30 entered Syria in mid-July, equipped with 30 American-made all-terrain vehicles, arms, and ammunition.
Eight of them, including a commander, were kidnapped on Thursday by Al-Nusra in a village in Aleppo province, the Observatory said.
Division 30 denounced the kidnapping of “Colonel Nadim Hassan” and his companions, demanding "the brothers of Al-Nusra Front to liberate them immediately".
The "New Syrian Force" is the term used by Washington to describe “Syrian rebels” who have been screened to exclude extremist elements and passed a training course led by US troops.