A Bangladesh Air Force training aircraft crashed into a school campus in the capital, Dhaka, shortly after takeoff on Monday, killing at least 31 people including the pilot and injuring more than 100, officials said.

Nearly all of the 31 killed when the plane crashed were children. Dozens more were being treated as the nation declared a day of mourning.

When a Bangladesh Air Force fighter jet crashed into her school and erupted in a fireball on Monday, Maherin Chowdhury rushed to save some of the hundreds of students and teachers facing mortal danger,