A female suicide bomber has killed two passers-by and her accomplice in Ngamdu village, Borno state.
Reports say that moments before the explosion, the female attacker and her accomplice, had tried to board a bus but were stopped by the driver.
One of the women is said to have strapped the bomb around her waist and it exploded after the bus departed, killing the other woman and two other people.
After the explosion, residents of the village shut themselves up in their homes leaving the four dead bodies on the road.
Almost 90 people have been killed in explosions blamed on Boko Haram this week alone, all of them at crowded bus stations in northern and central regions of the country.