Police in Bangladesh say they killed three suspected terrorists on Saturday, including the alleged mastermind of the attack on a Dhaka cafe that left 20 dead last month. After receiving a tip that several terror suspects were hiding out in a two-story house near Dhaka, counterterrorism police raided the house, leading to a shootout. Several men inside the apartment reportedly detonated explosive devices to destroy computers and other evidence of their crimes. Police found guns, ammunition and meat cleavers inside the apartment where the men were hiding. "We heard explosions inside the apartment and we understood that they were destroying evidence," said Sanwar Hossain, a senior police officer. "When we felt that they would not surrender, we made our final push and killed them." The suspects belonged to Jumatul Mujahedeen Bangladesh, a banned terror group, authorities said. Tamim Chowdhury was identified as one of the militants killed. Chowdhury was believed to be one of two masterminds behind the attack on a trendy Dhaka cafe in July, as well as a separate attack on July 7 that killed four people marking the end of the holy month of Ramadan.