At least 14 people were killed and another 39 injured by multiple bombings in Nigeria’s volatile city of Maiduguri, the epicenter of a six-year-long Boko Haram insurgency.

At least 14 people were killed and another 39 injured by multiple bombings in Nigeria's volatile city of Maiduguri, the epicenter of a six-year-long Boko Haram insurgency, the army said Friday.

Four suicide bombers detonated explosive devices in the city’s densely populated Sajeri area at about 7:30pm local time Thursday, army spokesman Col. Sani Usman said.

“There were explosions at Sajeri, not far from Maiduguri’s Ajilari Railway Crossing,” he said.

“It has been confirmed that 14 people lost their lives, including the bombers, while 39 others were wounded,” Usman said in a statement.

He said three of the blasts had occurred in the same area, while a fourth went off outside a local mosque, killing a number of Muslim worshipers.

Tunde Shotomi, head of security for government-run hospitals in the capital, told Anadolu Agency that the death toll had risen to 15, going on to suggest that the number could rise further.

The explosions in Maiduguri occurred near the scene of a previous attack on Sept. 21 that killed 54 people.

In an address to the nation delivered Thursday, President Mohammadu Buhari reiterated his vow to end the country’s six-year Boko Haram insurgency.