Fears of Boko Haram in Cameroon

Gunmen have broken into a prison in central Nigeria and freed about 200 prisoners.

It is not yet clear if the Islamist group Boko Haram was responsible but it has orchestrated several prison raids and controls a number of towns in north eastern Nigeria.

It has also been carrying out attacks across the border in Cameroon.

Thomas Fessy reports on the Cameroon Army's efforts to defeat the Islamists.