Dhaka, July 22:  A Bangladesh Air Force training jet crashed into a school building in Dhaka’s Uttara area on Monday. At least 20 people died and 171 were injured.

The jet was a China-made F-7 BGI aircraft. It crashed into the Milestone School and College while classes were going on.

Thick smoke and fire were seen at the crash site. Rescue teams rushed in and took the injured to six hospitals.

The Air Force said the plane took off at 1:06 PM local time (0706 GMT). Soon after, it lost control and crashed.

The jet hit the side of the building, damaging the walls and iron grills. A big hole was seen in the school’s structure. Firefighters sprayed water on the wreckage.

Authorities are still investigating the cause of the crash.