Kenya grenade attack kills at lease 6 in Nairobi church NAIROBI - A grenade attack on a Nairobi church Sunday killed a least six people and injured many others, the latest in a series of such attacks since Kenya sent troops to fight an al-Qaeda-linked militia in neighboring Somalia. The attack unfolded during Sunday service at God's House of Miracles International Church in Nairobi's Ngara enclave, police officials said. It came days after the U.S. Embassy here issued a warning of an impending attack in the Kenyan capital. "Timing of the attack is not known, however, the embassy has reason to believe that the potential attack is in the last stages of planning," the embassy said in a statement. Last month, grenades were hurled into a crowded Nairobi bus station killing nine and wounding 40. And days later in late March, a grenade detonated at a Christian gathering near the port city of Mombasa, killed one person. Minutes later, a second grenade attack unfolded at a bar near Mombasa's main sports stadium. There was no immediate claim of responsibility for Sunday's attack. But in previous attacks local authorities have blamed Somalia's Al Shabab militia, which is known to have recruits operating inside this East African nation. The militia has vowed to attack Kenya in retaliation for Kenyan forces entering their country.