Northern Nigeria is another area ripe for an Islamist revolution.

LAGOS, Nigeria (AP) — At least 67 people died in a wave of bombings and shootings carried out in northeast Nigeria overnight, officials said Saturday, as frightened mourners left their homes to begin burying their dead.

A radical Muslim sect known as Boko Haram claimed responsibility for the attacks, which represent the most coordinated and wide-ranging assault yet in their increasingly bloody sectarian fight with Nigeria’s weak central government. The sect, which wants the strict implementation of Shariah law, promised to carry out more attacks.

The attack started Friday when a car bomb exploded outside a three-story building used as a military office and barracks in Damaturu, the capital of Yobe state, Ibrahim Bulama, a Nigerian Red Cross official, said.

Gunmen then went through the town, blowing up a First Bank PLC branch and attacking at least three police stations and some churches, leaving them in rubble, he said. Gunfire continued through the night and gunmen raided the village of Potiskum as well, witnesses said, leaving at least two people dead there.

The Daily Trust, the newspaper of record in the Muslim north, said a Boko Haram spokesman identified as Abul-Qaqa spoke to the newspaper on Saturday and claimed the responsibility for the attacks.

The attacks around Damaturu came after four separate bombings struck Maiduguri, about 80 miles to the east. One blast detonated around noon outside the El-Kanemi Theological College where parents had gathered. The police said others had entered the college grounds to attend Friday Prayers at a mosque on its campus.

Witnesses said they saw ambulances carry away at least six wounded people. Another bombing alongside a road in Maiduguri killed four people, Police Commissioner Simeon Midenda said.

A short time later, suicide bombers driving a black SUV tried to enter a base for the military unit charged with protecting the city from Boko Haram fighters, a military spokesman, Lt. Col. Hassan Ifijeh Mohammed, said. The SUV could not enter the gate and the explosives were detonated outside of the base, damaging several buildings in the military’s compound, Colonel Mohammed said.