DHAKA, Bangladesh, July 22, (AP): Hundreds of students protested near the site of the crash of a Bangladesh air force training jet into a school in the nation’s capital, demanding accountability, compensation for victims' families and the halt of training flights. The death toll from the crash rose to 31 on Tuesday, including 25 students, a teacher who died from burn injuries she sustained while helping others get out of the burning building, and the pilot of the training aircraft.

Firefighters further secured the scene of the crash in Dhaka’s densely-populated Uttara neighborhood while an investigation by the military was ongoing. The country’s civil aviation authority was not involved in the investigation directly. Bangladesh, in shock after the crash involving its air force, marked Tuesday as a national day of mourning, with the national flag flying at half-staff across the country.

Monday’s crash at the Milestone School and College caused a fire that left the two-story school building in Dhaka in flames. Officials said 171 people, mostly students and many with burns, were rescued and taken from the scene in helicopters, ambulances, motorized rickshaws and in the arms of firefighters and parents.

The students protesting outside the crash site at the Milestone School and College demanded "accurate” publication of identities of the dead and injured, compensation for the families, and an immediate halt to the use of "outdated and unsafe” training aircraft by the Bangladesh air force. They chanted slogans and accused security officials of beating them and manhandling teachers on Monday.

The students also became furious after two senior government advisers arrived at the scene, forcing the officials to take cover. On Tuesday, 78 people, mostly students, remained hospitalized, said Sayeedur Rahman, a special assistant to Bangladesh’s interim leader Muhammad Yunus. Twenty deaths were reported initially, and seven died of their injuries overnight, authorities said. Maherin Chowdhury, a teacher who rescued more than 20 students from the burning school, died from severe burn injuries, her colleague Tanzina Tanu said.