Gunshots and explosions today rocked the Bangladeshi capital after police laid a siege to a six-storey building where suspected militants belonging to an outlawed group behind the country's worst terror attack were holed up.<br/><br/>Bangladesh's elite anti-crime Rapid Action Battalion (RAB) has evacuated residents in the neighbourhood area after two Islamists were arrested from the central Tangail district.<br/><br/>Officials and witnesses said the RAB troops cordoned off the building after midnight yesterday and asked the neo-JMB militants to give-up but they have so far responded with gunshots and petrol bombs.<br/><br/>Bangladesh witnessed a spate of attacks on secular activists, foreigners and religious minorities since 2013. The country launched a massive crackdown on militants specially after the Dhaka cafe attack.