Nigerian Christians are likely to be attacked in the coming weeks, as spokesman for the Islamic militant group Boko Haram announced on Sunday.

The Islamist group announced on Sunday a "war" on Christians and said it would launch a series of "coordinated" attacks in order to annihilate the entire Christian community living in the northern parts of the country.

 "We will create so much effort to end the Christian presence in our push to have a proper Islamic state that the Christians won't be able to stay," as an unnamed spokesperson of the group said.

Boko Haram has claimed responsibility for killing Christians in the past. The extremist group last attacked a church in the central city of Jos late February, by setting off a bomb that killed three people and injured several others.