In Nigeria, unidentified gunmen have kidnapped 15 school children in their school bus in the southern Abia State.Local media report said the driver of the bus had picked the children at designated points and was on the way to school when the suspected kidnappers struck. The kidnappers are said to be demanding 20 million naira as ransom. State police spokesman Geoffrey Ogbonna said he was yet to get any report on the incident. Abduction is common in Nigeria. Over 300 foreigners have been seized in the Niger Delta since 2006. Almost all have been released unharmed after paying a ransom.