A 55-year-old man was killed and three others-including two children, were injured as a boundary wall collapsed on them at a madrasa in Sadar upazila’s Chakfarid area of Bogura early today. The deceased was identified as Ainul Haq, a nightguard of the Jamil Madrasa and a resident of Charnandia's village of Sirajganj. The injured are Mst. Mukta, 35, a parent of a student, and two students-  Md. Hamim, 12, and Kahalur Md. Meftajul,5.  ASI Abdur Rahman of Bogura Sadar police station said a team of firefighters rescued and rushed them to the Shaheed Ziaur Rahman Medical College. Also Read: DSCC declares collapsed building in Science Lab area as 'risky' According to locals, the boundary wall had been tilting outward for several months before the accident. Legal action will be taken in accordance with the deceased’s family, police said.