Updated

A Nigerian Red Cross official says at least 12 people were killed and 80 wounded in bomb attacks on three churches in the country's north.

Andronicus Adeyemo says 10 people were killed and at least 29 wounded in a blast in the city of Kaduna Sunday morning. He says two people died and 51 were wounded in two church attacks in the nearby city of Zaria. He says the Zaria attacks occurred about 10 minutes apart in different parts of the city.

Churches have been increasingly targeted by violence in Nigeria, a nation of more than 160 million people almost equally divided between Muslims and Christians.

An Easter Day blast in Kaduna killed at least 38 people. A Christmas Day suicide bombing of a Catholic church near Nigeria's capital killed at least 44 people.