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.”

At least 19 people were killed and 164 injured as a Bangladesh air force training jet crashed into a college and school campus in the capital Dhaka on Monday after experiencing a technical problem shortly after take-off,