President Goodluck Jonathan of Nigeria has vowed to defeat Boko Haram militants following a series of attacks suspected to have been carried out by the group in recent weeks.
On Thursday, at least 10 people were injured by a suicide bomber near a church in Gombe, north-east Nigeria.
Day before that attack, 11 people were killed when a bomb went off on a bus heading from Gombe to neighbouring Yobe state.
President Jonathan said the group had caused “agony” in the country.
At least 26 people were killed in bomb attacks in the cities of Gombe and Bauchi in December. On 24 December, Nigeria’s Borno and Yobe states imposed temporary travel bans in an attempt to prevent attacks by Boko Haram.
“I want to assure you that the terrorists will not get away with the atrocities, they will not win,” Mr Jonathan said in his new year’s address.
“We will bring justice to the savage terrorists known as Boko Haram. They will be defeated.”