A bomb thrown into an Arabic school in Nigeria wounded seven people just days after a series of deadly church bombings in the country, authorities said.
Officials in the African nation's Delta State said the homemade bomb was thrown into the school from a car late Tuesday.
The school attack came after a string of four coordinated bombings at Christian churches Sunday that killed at least 39 people, the Voice of America reported.
The radical Muslim sect Boko Haram has claimed responsibility for the Christmas Day attacks, the latest in a series of clashes between Christians and Muslims in Nigeria.
Nigeria's population of 150 million is evenly divided between Muslims, who live mostly in the north, and Christians who dominate the south.
Christians in northern Nigeria say the increased violence could lead to a religious war.
Boko Haram wants to establish a strict Islamic state in Nigeria and does not recognize the government or the country's constitution.