Six suspected members of Jamaat-e-Islami and its student front Islami Chhatra Shibir were arrested with improvised bombs and Jihadi books in South Keraniganj on Monday night. “We suspect that they gathered there to carry out subversive activities,” said Shah Zaman, the officer-in-charge of South Keraniganj Police Station. He said they raided Hasnabad Housing building at night and arrested the men. “We recovered four improvised bombs, a large number of Jihadi books and training materials from there,” he said.