(http://news.bbcimg.co.uk/media/images/81153000/png/_81153658_nigeriabornobaga464040115.png) It is not yet clear whether other armies were involved in the recapture of Baga. However, the Chadian army spokesperson said there had been no involvement from his country's troops.
Chad has been carrying out attacks against Boko Haram deep inside Nigeria.
The Nigerian army has been criticised by its failure to tackle the militant group, although it has recaptured some territory in recent weeks.
Last week, Nigeria retook the north-eastern towns of Monguno and Marte from the group.
(http://news.bbcimg.co.uk/media/images/81154000/jpg/_81154790_9b727092-dbfb-4b1b-8db9-7fc209612344.jpg) President Jonathan has been criticised for delays to the presidential election over security fears Earlier this month, presidential elections were delayed for six weeks over security concerns.
The electoral commission said it made the decision after the security agencies advised there would not be enough troops available to guarantee the safety of voters.
President Goodluck Jonathan says the election will take place on 28 March. However, critics loyal to the opposition say they fear Mr Jonathan, who is running for a second term, will use the delay to hold on to power.
The election is seen as the most closely fought since the end of military rule in 1999.
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Boko Haram at a glance(http://news.bbcimg.co.uk/media/images/80142000/jpg/_80142357_afp_bh.jpg)
- Founded in 2002, initially focused on opposing Western-style education - Boko Haram means "Western education is forbidden" in the Hausa language
- Launched military operations in 2009 to create Islamic state
- Thousands killed, mostly in north-eastern Nigeria - has also attacked police and UN headquarters in capital, Abuja
- Has abducted hundreds, including at least 200 schoolgirls
- Controls several north-eastern towns
- Has launched attacks on Cameroon
Why is Boko Haram so strong? (http://www.theinfostride.com/news/world-africa-30933860)
Soldiers without weapons (http://www.theinfostride.com/news/magazine-30930767)
Source: BBC