At least eight people have been killed and 28 others injured in an attack in Nigeria's restive northeast, witnesses said.

A teenage suicide bomber on Friday blew himself up in a grain market in the town of Gombi in Adamawa state, AFP news agency reported, citing witnesses. 

No one has claimed responsibility for the attack.

Al Jazeera's Ahmed Idriss, reporting from the Nigerian capital, Abuja, said: "The bomber struck on the busiest day of the market when buyers and sellers from different towns and villages come to transact sales."

The region is often targeted by the ISIL-linked armed group, Boko Haram.

Source: Al Jazeera And Agencies