DHAKA: Three suspected Islamist extremists were killed Tuesday in a raid by Bangladesh police as security was stepped up before Pope Francis’s landmark visit to the Muslim-majority nation, officials said. The suspects opened fire and threw bombs at Rapid Action Battalion police who cordoned off a house where they were hiding near the border with India, officials said. “We called on them to surrender. But they responded by opening fire and throwing bombs. Moments later we heard loud explosions inside the house,” Major Ashraf, an RAB officer, told Agence France-Presse. The officer said a search of the tin-roofed house in Chapai Nawabganj district in the northwest of the country was being completed. RAB deputy head Colonel Anwar Latif Khan told Agence France-Pressse that “three people who were involved in Islamist militancy were killed” in the explosions. RAB officials said the house was raided following a tip-off.