A Bangladeshi military training aircraft crashed into the campus of a school in Dhaka, killing the pilot and at least 19 others, mostly students, officials say.

More than 170 people were injured after the training aircraft crashed, military officials said. The country’s interim leader called the loss “irreparable.”

The incident came a little over a month after an Air India plane crashed on top of a medical college hostel in neighbouring India’s Ahmedabad city, killing 241 of the 242 people on board and 19 on the ground, marking the world’s worst aviation disaster in a decade.