Nigerian police are searching for 15 school children who were kidnapped in southeastern Nigeria by gunmen.
Police said Tuesday the kidnappers hijacked the school bus the children were riding in and have demanded a ransom of more than $100,000.
They say the attack took place early Monday while the nursery and primary school children were being driven to the Abayi International School, in Abia state.
There have been a number of kidnappings for ransom in Abia state, near Nigeria's oil-rich Niger Delta region.
Most of the kidnappings in the Niger Delta initially involved foreign oil workers, but more recently attackers have also targeted the children and relatives of wealthy Nigerians.
Most of those who are abducted are later released unharmed, usually after a ransom is paid.
Some information for this report was provided by AP, AFP and Reuters.