At least 20 people have been killed after a Bangladesh Air Force jet crashed into a private school campus in the south Asian country’s capital, Dhaka, on Monday.

Bangladesh, in shock after the crash involving its air force, marked Tuesday as a national day of mourning, with the national flag flying at half-staff across the country.

At least 29 people, most of them children, were killed when the F-7  BGI crashed into the school, trapping them in fire and debris.