At least eight people have died in an explosion at a major bus station in Gombe state in north-eastern Nigeria, witnesses have told the BBC.
Many people were injured in the rush hour blast in Gombe city, a hospital source said. Other witnesses spoke of three bags of explosives going off.
Gombe shares a border with three states placed under emergency rule to fight the Boko Haram Islamist insurgency.
The group has taken full control of Mubi, a commercial centre in Adamawa.
It is the largest town Boko Haram has taken since it stepped up its insurgency when the state of emergency was declared in May 2013 in Adamawa, Borno and Yobe.