Police said Saturday the attacks occurred in Adamawa and Yobe states on Friday night.

In Adamawa, officials say gunmen suspected to belong to Boko Haram killed eight worshippers at a church. In Yobe, a gun battle between the sect and police killed at least two people.

The attacks come after 20 Christians died during a town hall meeting in rural Adamawa state.

Authorities blamed the attacks on Boko Haram, a radical sect in Nigeria, a multiethnic nation of more than 160 million people.