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.
"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.
Clashes broke out after the assault that killed five Al-Nusra fighters and allied militants, as well as six rebels who were defending Division 30, said Observatory director Rami Abdel Rahman.
In a statement posted on its Facebook page about the attack, Division 30 called on Al-Nusra to stop "spilling the blood of Muslims".
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 yesterday 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".
"I can confirm that there have been no New Syrian Force personnel captured or detained," said Commander Elisa Smith.
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.
More than 230,000 people have been killed in Syria since the conflict began in March 2011 with anti-government protests that descended into a civil war after a regime crackdown.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
