ABUJA, Jan. 3 (Xinhua) -- Ten people including the attacker's biological father have been confirmed killed in a suicide attack on a mosque early Wednesday in Nigeria's northeastern town of Gamboru, according to local residents and officials.

A teenage male suicide bomber known in the area sneaked into the local mosque and detonated an improvised explosive device strapped to his body during an early morning prayer in the mosque in the northeastern state of Borno, said Abba Lawan, a resident.

Lawan said the suicide bomber's biological father was among the early worshippers in the mosque.

"The suicide bomber hailed from Gamboru town, he disowned his parents and joined the terrorists in the bush," said Lawan. "Wounded persons have been referred to a clinic for treatment."

The Nigerian military, while confirming the attack to Xinhua, said another suspected suicide bomber was killed in Rann, another town located in Kala-Balge area of Borno.

Rogers Nicholas, the commander of the troops fighting the Boko Haram terror group in the northeast region of Nigeria, said only five bodies of the victims had been recovered so far by the military.

Nigeria has made a considerable gain on the Boko Haram front, with its security forces having dislodged Boko Haram fighters from the Sambisa Forest, their last enclave in the country.