Nigerian Christians are asking American churches to pray they will be safe from attacks this Christmas, CBN News reports. The radical Islamic group Boko Haram is carrying out a war to drive Christians from northern Nigeria, and dozens of Christians have died in bombing attacks during Christmas services the past two years. Rev. Musa Asake, general secretary of the Christian Association of Nigeria, says he's "very, very worried" -- but he says that won't stop Nigerian Christians from going to church on Christmas. He is asking Christians in America to pray that "the Lord will intervene to protect churches." More than 770 people have been killed in Boko Haram attacks so far this year, making 2012 the worst year of violence attributed to the group.