Local officials say gunmen in northern Nigeria have released 10 more students after a ransom was paid, but 21 others remain in captivity despite a pledge to release them all.

The Rev. John Hayab, the chairman of the local Christian association, says the kidnappers had collected money three days ago. 

He says the 10 freed students were returned to their parents Saturday night.

Imoh Edet has more on this story.