At least 20 people have been injured in an incident in Rivne, Ukraine, after debris from a downed drone fell onto a building at a local educational institution.

The debris partially damaged the building’s second floor and sparked a fire, which firefighters have since extinguished, according to strana.ua.

Emergency crews are now working to dismantle and clear the damaged structures.

According to preliminary information from the emergency service, 20 people were injured in the incident.