KANO, Nigeria — Coordinated attacks claimed by a radical Islamist sect killed at least 120 people in north Nigeria’s largest city, hospital records seen Saturday show, as gunfire still echoed around some areas of the sprawling city.

Soldiers and police officers swarmed over streets Saturday in Kano, a city of more than 9 million people that remains an important political and religious hub in Nigeria’s Muslim north.

But their effectiveness remains in question, as the uniformed bodies of many of their colleagues lay in the overflowing mortuary of Murtala Muhammed Specialist Hospital, Kano’s largest hospital.

Hospital records showed at least 120 people died in the attacks that started Friday afternoon after Muslim prayers and as shops closed for the weekend.

Other bodies likely lay at other clinics and hospitals in the city.

In a statement issued late Friday, federal police spokesman Olusola Amore said attackers targeted five police buildings, two immigration offices and the local headquarters of the State Security Service, Nigeria’s secret police.