LAGOS, Feb. 17 (Xinhua) -- At least 15 people were killed and 18 injured when three suicide bombers carried out an attack at a market in Nigeria's northeastern Borno state on Friday, local media reported.
The attacked was reportedly launched in the evening local time at a market in Borno state.
It is yet unknown who was responsible for the bombing.
The Boko Haram militant group has stepped up its campaign of suicide bombing using girls, usually veiled, to blow up targets in Nigeria's northeast.
Earlier this month, six people were killed and 39 others injured in a suicide attack in northeastern Nigeria.
A New Year's Day blast killed at least three people in Nigeria's northeastern town of Madagali.
