A few weeks ago, heavily armed men attacked the Bethel Baptist High School in Nigeria - more than 100 children were kidnapped.
Some have now been released.
Lagos - 28 children were released after dozens of schoolchildren were kidnapped in Nigeria, West Africa, in early July.
At least 80 other children are still in the hands of the kidnappers, the police said.
The released children were found on Saturday evening in the village of Sabon Gaya, said the police spokesman for the state of Kaduna.
According to earlier information from the state government, heavily armed men attacked the Bethel Baptist High School in Damishi village on July 5 and kidnapped the children.
The president of the Nigerian Baptist Community, Israel Akanji, told local journalists that the kidnappers had dropped the children in the village.
The church did not pay a ransom.
Major child abductions related to school robberies are common in Africa's most populous country.
Behind it are both Islamist terrorist groups such as Boko Haram and criminal gangs who want to extort ransom.
dpa
