Bangladeshi students are demanding answers and action after a military training jet crashed into their school, killing at least 31 people.

The F-7 BGI jet, a variant of a Chinese fighter, crashed into the campus of the Milestone School and College, in the Uttara neighborhood of Dhaka. The pilot was among the dead, according to the military and a fire official, and 171 people, mostly students, have been injured.

A Bangladesh Air Force jet crashed into a college in the capital Dhaka on Monday, killing at least 27 people, mostly children, according to officials – in the country’s deadliest air incident in recent memory.