Two female suicide bombers killed at least six people at a textile market in Kano, Nigeria, less than two weeks after a series of blasts killed more than 100 at a mosque in northern Nigeria's biggest city.

Another nine people were injured in Wednesday's attack, Adenrele Shinaba, police commissioner for Kano state, said at the scene of the bombings in the Kwari market. The area has been secured and the injured taken to a hospital, Magaji Musa Majia, a police spokesman, said by phone from the city.

At least eight people were killed, including the two bombers, Tasiu Bashir, a member of the Kwari Market Association, said in an interview at the bomb site. Nobody immediately claimed the attack.

Nigeria, Africa's biggest economy, is struggling to contain a rebellion by the Islamist group Boko Haram, whose name roughly translates as "Western education is a sin." The militants have killed more than 13,000 people in the past five years, according to the government.

The first female suicide bomber blew herself up at the busy market around 2:30 p.m., while the second exploded two minutes later, Saminu Sulaiman, a businessman, said at the market.

President Goodluck Jonathan, who is seeking re-election in February, has ordered a "full-scale" investigation into the Nov. 28 bombings at the Kano mosque.