A video has been released by a group linked to extremists Boko Haram, showing the chairman of the Christian Association of Nigeria (CAN) in Adamawa state pleading for help from captivity.

Rev Lawan Andimi was declared missing last week following a raid on Michika Town.

In the video he states that he's not discouraged "because all conditions [in which one] finds himself is in the hands of God," whom he credits for the fact that he is being treated relatively well by the terrorists.

He goes on to ask for colleagues to work with authorities to secure his release.

While expressing confidence that he might return to his wife, children and colleagues "by the grace of God", he adds that if this is not possible, then "maybe it is the will of God." Pastor Andimi concludes by stating: "don't cry, don't worry, but thank God for everything."

Rev Andimi was thought to have been taken when terrorists dressed as military ransacked the town for food and valuables. Prior to the release of the video, the pastor was last seen being forced into a Toyota Hilux.

Religious freedom charity Christian Solidarity Worldwide (CSW) is raising concern for him.

CSW's founder and chief executive Mervyn Thomas said: "We are deeply concerned by Pastor Andimi's abduction and call for his unconditional release. 

"We echo his plea for Governor Ahmadu Umoru Fintri and any other officials with influence to intervene to secure the release of this courageous man."