Kolkata: Four JMB terrorists, suspected to have beeninvolved in anti-India activities and engaged in recruiting unsuspected youth for the terror group, have been arrested from two entry points of Howrah and Sealdah stations in the city after the Kolkata Police laid an ambush following specific inputs. Police investigating the trails of Bangladesh-based outfit on Tuesday said among the four arrested Jamaat-ul-Mujahideen Bangladesh (JMB) terrorists, three hail from Bangladesh and one from Birbhum district of West Bengal, possessing Islamist State literature and other incriminating documents. While two terrorists, identified as Md Jiaur Rahman and Mamonur Rashid - the Bangladeshis, were arrested from close to Sealdah station early on Tuesday, two others Md Sahin Alam and Robiul Islam were arrested from Howrah Station yesterday.