Cameroon's defence ministry spokesman has said that the Central African nation has deployed some 1,000 troops and armoured vehicles to its border region with Nigeria to counter a rising threat from Boko Haram Islamist militants.
Lieutenant Colonel Didier Badjeck said: "Their mission will be to carry out reconnaissance and be ready to respond with enough fire power."
Boko Haram, which outraged international opinion with the abduction of some 200 schoolgirls in northern Nigeria seven weeks ago, has also carried out attacks in northern Cameroon.
The Nigerian military has flown more than 300 sorties in the hunt for the abducted schoolgirls, a Major has told ITV News' Rageh Omaar.
A newly released video from Boko Haram reportedly shows the kidnapped Nigerian schoolgirls.
The man who started a viral hashtag campaign in support of the kidnapped Nigerian schoolgirls says it has forced the government to act.