Nigeria's military and presidency have reportedly reached a deal with Boko Haram militants on a ceasefire and the release of more than 200 kidnapped schoolgirls.
President Goodluck Jonathan said an agreement to end hostilities had been reached following talks, as well as the release of 219 girls held captive since April.
Boko Haram militants took around 270 girls from a secondary school in a village near the Cameroon border sparking a worldwide outcry.
More than 50 managed to escape.
In May, the Islamists offered a prisoner swap to release the girls, but the proposal was rejected by the government.
However, questions surround the purported deal, given that Mr Jonathan is expected to declare his re-election bid and positive news about the hostages and violence could give him a political boost.
There was also uncertainty about the identity of Danladi Ahmadu, who was said to be Boko Haram's representative at the talks and who gave a radio interview broadcast this morning.
Multiple analysts cast doubt on Mr Ahmadu's credibility as a Boko Haram envoy while Nigeria has made similar ceasefire claims in the past which failed to materialise.
"I have never heard of such a man (Ahmadu) and if Boko Haram wanted to declare a ceasefire it would come from the group's leader Abubakar Shekau," said Shehu Sani, a Boko Haram expert who has negotiated with the group before on behalf of the government.
"This whole thing is hoax. Ahmadu is not a part of Boko Haram," said another source with intimate knowledge of the group.
Elsewhere, eight Cameroon soldiers and 107 Boko Haram militants have been killed in fighting in the far north of the country.
