A Bangladesh court has sentenced a militant to 15 years in prison for involvement in a wave of bomb attacks that killed at least 24 people since August. Obaidullah Sumon was convicted to possessing explosives and bomb-making materials. Police arrested Sumon last year with four kilograms of gunpowder and 50 detonators. Authorities say he was a member of the outlawed Jamaat-ul-Mujahedin militant group blamed for setting off more than 400 small bombs across Bangladesh on August 17th. The group is also accused of deadly bomb attacks against courts and judges as part of a campaign to impose strict Islamic Sharia law in the mainly Muslim democracy. Bangladesh is governed by secular laws. Sumon is the first suspected militant to be sentenced of about 800 detained in connection with the bombings.