NAIROBI, Kenya (AP) — A Kenyan court has sentenced a man to life imprisonment after he plead guilty to taking part in twin grenade attacks and said he was a member of the al-Qaida-linked Somali militant group al-Shabab. Two other men plead not guilty. Principal Magistrate Grace Macharia said Friday she hoped the sentence she gave to Elgiva Bwire Oliacha, also known as Mohammed Seif, would help deter other would-be attackers. The 28-year-old Oliacha looked calm and relaxed after sentencing, smiling and posing for photographs with his manacled hands in front of him. He says he will not appeal. Oliacha was found with six guns, 13 grenades and hundreds of bullets in his house. He is not ethnic Somali. Monday's twin blasts came about a week after hundreds of Kenyan forces moved into neighboring Somalia to attack al-Shabab militants.