Police yesterday morning arrested 13 suspected activists of the outlawed Islamist militant organisation Jamaatul Mujahideen Bangladesh (JMB) raiding different places in Kurigram. The arrestees are: Neamul Arif Likhi Chaudhury, 26, Ershadul Haque Mithu, 26, Mokhlesur Rahman Mithu, 20, and Mamun, 22, of Bhurungamari upazila, Angur, 18, Raihan Kabir Rana, 19, Shahidul Islam Shahin, 18, and Mahmudul Mamun, 20, of Chilmari upazila, Lal Miah, 28, of Raumari upazila and Abdul Hai Sarkar, 55, Ripon, 18, Maniruzzaman, 22, Alam, 19, of Sadar upazila of the district.Police sources said police arrested them following information extracted from militant leader Matin Mehdi, chief of an Islamist militant organisation "Allaher Dal", and three others who were placed on a five-day remand Friday. Superintendent of Police of Kurigram Choudhury Manjurul Kabir said they are trying to find out how the militant network spread in the country by questioning the militants.