Nigeria military said over 300 Islamic militants were killed in northeast Borno state.
Nigeria's military is claiming more than 300 Boko Haram fighters were killed when troops recaptured the garrison town of Monguno in northeast Borno state.
"Over 300 terrorists were killed while a few were also captured," defence spokesman Chris Olukolade said in an emailed statement.
There was no independent verification of the claims, which follow similar assertions about Boko Haram casualties by Niger, Chad and Cameroon, who are all involved in the regional fight against the militants.
Meanwhile, Boko Haram leader Abubakar Shekau vowed to disrupt Nigeria's general election in a video released yesterday.
"This election will not be held even if we are dead. Even if we are not alive Allah will never allow you to do it," Shekau said in the Hausa language, presumably referring to the polls scheduled for 28 March.
The video appeared to be the first message released by the group on Twitter, a sign of its changing media tactics after previous messages were distributed to journalists on DVD.
Shekau was shown in unusual clarity in front of a solid blue background, dressed in black and with an automatic weapon resting to his right.
He also claimed a weekend attack in the northeast Nigerian city of Gombe, which the military says was repelled.
The Islamist leader, declared a global terrorist by the United States and sanctioned by the United Nations, disputed the military's account of the Gombe clashes, claiming that his fighters overran troops and freed insurgents from prison.
Nigeria's general election had been scheduled for 14 February but was postponed by six weeks, with the security services saying they needed more time to contain the violence in the northeast, Boko Haram's stronghold.
Despite Shekau's threat, experts doubt that the Islamist rebels have the capacity to disrupt voting nationwide, although election officials have conceded that voting could prove impossible in parts of the northeast.