Hundreds of students gathered outside the smoldering remains of a school in the Bangladeshi capital on Tuesday to demand answers after a military jet slammed into the campus, killing dozens of children.

At least 20 deaths have been reported so far. And over 170 people have encountered injuries, according to officials.

A Bangladesh air force training jet has crashed into a school campus, killing at least 19 people. Here’s the latest we know: “Bangladesh Air Force’s F-7 BGI training aircraft crashed in Uttara. The aircraft took off at 13:06 [07:06 GMT],” the Bangladesh military’s public relations team said.