Two people were killed and two others injured when an under construction mud house collapsed at Paharipukur village in Sapahar upazila of Naogaon district on Tuesday evening. The deceased were identified as, Iliyas Ali, 50, son of Siddique Hossain of Paharipukur village and Nuruzzaman, 32, son of Yousuf Ali of Beldanga village in the upazila. Obaidul Haque, OC of Sapahar police station, said Erfan Ali was building a two storied mud house. Suddenly the upper portion of the under construction mud house collapsed at around 6:30 pm on Iliyas, Nuruzzaman, Monzur Hossain and house owner Erfan Ali, leaving them seriously injured. Iliyas and Nuruzzaman succumbed to their injuries on their way to Sapahar upazila health complex.