It was the most serious violence against Syrian minors since a twin suicide bombing killed at least 25 children near a school in October.
The children of the Haya School in the town of Qaboun were struck by three mortars, said a local activist who uses the name Abu Akram al-Shami.
Another local activist, Amar al-Hassan, based near Damascus, also confirmed the incident, as did Rami Abdurrahman of the Britain-based Syrian Observatory For Human Rights.
Abdurrahman said 11 children were confirmed killed, but the number was likely to rise because of the seriousness of many of the children's wounds.
Another showed at least five boys bloodied and lying lifeless on the ground of what appeared to a medical faculty.
The videos appeared genuine and corresponded to Associated Press reporting of the incident.
The local activist collective, the Qaboun Media Office, said at least 17 children were killed. Conflicting death tolls are common after such incidents.
It was not immediately clear who fired the rockets. Both pro-government forces loyal to President Bashar Assad and rebels opposed to his rule use the weapons.
The town hosts thousands of Syrians who have been forcibly displaced from other rebel-held areas.
Activists said they believed Assad loyalist forces fired the mortar shells because it was unlikely that rebels would fire at their own people. Government officials had no immediate comment.
Syrian children have often been the victims of the country's war, now in its fourth year, but they are rarely specifically targeted.
But in October, two suicide bombers targeted a school in the central city of Homs, killing 32 people, including 25 children.
You’ve hit 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
Access to Exclusive Premium Stories Online
Over 30 behind the paywall stories daily, handpicked by our editors for subscribers


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