Militants from Boko Haram were blamed for the suicide bombings Sunday night at a crowded mosque and a posh Muslim restaurant in the central city of Jos; a suicide bombing earlier at an evangelical Christian church in the northeastern city of Potiskum, and attacks in several northeastern villages where dozens of churches and about 300 homes were torched.
President Muhammadu Buhari condemned the attacks on places of worship and said the government will defend Nigerians' right to worship freely.
Earlier this year, Boko Haram became an affiliate of the Islamic State group.
The deadliest attack came on Wednesday when more than 140 people were killed - mostly men and boys mowed down by gunfire as they prayed in mosques in the northeastern town of Kukawa.
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Burials were held Monday for 51 people killed by the two bombings a day earlier in the city of Jos, said Muslim community lawyer Ahmed Garba.
The explosion at the Yantaya Mosque came as cleric Sani Yahaya was addressing the worshippers, survivors said. Yahaya is the national chairman of the Jama'atu Izalatul Bidia organization, which preaches that all religions should peacefully coexist.
Garba said gunmen also opened fire on the mosque from three directions.
Survivor Danladi Sani said he saw a man dressed in white take aim at Yahaya, and then blow himself up. Yahaya was unharmed, Sani added.
"He is a great Islamic scholar who has spoken out against Boko Haram, and that is why we believe he was the target," Sani told The Associated Press.