The Syrian Observatory for Human Rights said nine girls were killed and another 20 wounded, mostly students from the regime-held district of Hrabesh.
"The toll is likely to worsen as some of the injured are in serious condition," the Observatory's Rami Abdel Rahman told AFP.
The Islamic State group has controlled nearly all of oil-rich Deir Ezzor province since 2013, but half of the regional capital remains in the government's hands.
In recent weeks, the US-led coalition and Russia's military have targeted IS jihadists in the province with air strikes.
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
