Bagmara police filed a case over the bomb blast at Ahmadiyya mosque during Jumma prayers at Chakpara village under Bagmara upazila in Rajshahi on Friday.The case was filed against unknown miscreants under explosive material act around 11pm on Friday.Motiar Rahman, Officer in Charge of Bagmara Thana Police of Rajshahi confirmed the matter to JagoNews24.com.Earlier on Friday, a person was killed in a suicide bomb attack at an Ahmadiyya mosque during Jumma prayers at Chakpara village under Bagmara upazila in Rajshahi.