A pastor was killed and 11 others wounded in the eastern Kenyan town of Garissa on Sunday when suspected Islamic extremists launched a grenade through the sheet-iron roof of Utawala Interdenominational Church during the worship service, the Christian Post reports. At least three of the 11 injured had wounds so serious they were airlifted to Kenyatta General Hospital in Nairobi. According to a source, the grenade "landed right at the podium where the chaplain was delivering a church sermon, hitting him right at the forehead, and he died immediately." Then followed several gunshots, the source added. It is suspected the blast could be a revenge attack by sympathizers of the terror group al Shabaab in neighboring Somalia, where Kenyan forces are involved in fighting the Islamists.