Islamist extremist group Boko Haram have killed four Nigerian soldiers in a night-time ambush.
The attack took place outside the north-eastern city of Maiduguri, in the same part of the country where the group kidnapped 200 schoolgirls on April 14th.
Defence officials also said several Boko Haram fighters were killed in the firefight.
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.