People are dying from extreme heat, which is also killing a large number of chickens and destroying tea plants
The two were found dead at Huffaz ul Quran Madrasa in Chandna neighbourhood early Tuesday morning, said Md Moktar Hossain, chief of Bason Police Station.
The dead have been identified as Mahmuda Akter, 21, wife of madrasa director Ibrahim Khalil, and Md Mamun, a student of the same religious school.
Ibrahim Khalil is the key suspect in the case, Hossain said citing some students. The police are interrogating him over the incident, Hossain said.
Another child of Mahmuda was also injured.
More to follow