At least 13 people were killed and more than 50 wounded in a dual suicide bomb attack at a busy morning market in northeast Nigeria today, according to local sources.

The attacks occurred in the town of Biu, about 185km south of the Borno State capital, Maiduguri, which has been at the epicentre of Boko Haram's Islamist insurgency.

"Two female suicide bombers infiltrated and gained entry into Biu," a local police spokesman said.

"One of the bombers detonated an IED (improvised explosive device) strapped to her body within Biu's main market, while the other one detonated outside the market square," the spokesman said.

The police said 13 people were killed, while a spokesman for a local civilian militia, Ibrahim Saidu Maniya, said the death toll was as high as 18.

No one has claimed responsibility for the attack, but the Boko Haram group, led by Abubakar Shekau, has previously used women and adolescent suicide bombers to carry out attacks in the area.

Biu and neighbouring villages have been repeatedly hit by suicide and bomb attacks blamed on Boko Haram over the last eight years. In August 2015, a suicide bomber killed at least 50 people at a market in a nearby village.

Despite increased military success in the fight to dislodge Boko Haram, the group continues to launch deadly attacks in the country.

At least 20,000 people have been killed and more than 2.6 million others made homeless in the group's quest to establish a hardline Islamic state in northeast Nigeria.