Policemen assess the scene of an explosion at the Anglican Church of Kenya (ACK) Sunday school along Juja Road in the Kenyan capital Nairobi, September 30, 2012. A nine-year-old boy was killed and three other children wounded when a hand grenade was thrown into a Sunday school session in the church in Nairobi, police and medical staff said. REUTERS/Thomas Mukoya (KENYA - Tags: SOCIETY CIVIL UNREST CRIME LAW DISASTER)