The death toll from two suicide attacks on a mosque in Nigeria's Maiduguri city, capital of the northeastern state of Borno on Thursday, has risen from 14 to at least 29, local rescue workers said Friday. Fifteen injured people died while receiving treatment at various hospitals in the Maiduguri metropolis, an unnamed official of the National Emergency Management Agency, the state-run rescue outfit, said. Local police said late Thursday that at least 14 people, mainly worshippers, were confirmed killed after two suicide bombers hit the mosque in Molai, an area located on the outskirts of Maiduguri, detonating their improvised explosive devices in and outside the mosque respectively, causing the building to collapse. The two suicide bombers were among the casualties counted, Borno State police chief Aderemi Opadokun added. Thursday's incident was the second this week to hit the northeastern city of Maiduguri, capital of Borno State, after multiple blasts killed at least eight people in another location. The militant group Boko Haram was blamed for the attacks. The group, fighting against the government to create an Islamic state, has carried out waves of bombings in the northern region and capital city of Nigeria over the years. Nigerian President Muhammadu Buhari has ordered military chiefs to end the insurgency of Boko Haram in the most populous African country by December.