A series of bomb blasts in Nigeria, two of which targeted Christmas Day church services, have killed 39 people.
The Islamist group Boko Haram said it carried out the attacks.
A blast outside a church near the capital Abuja claimed 35 lives and a policeman died in a second explosion at a church in the central city of Jos.
Four people were killed at Damaturu in the north-eastern state of Yobe.
The United States condemned the attacks, which it said appeared to be acts of terrorism.
Boko Haram has been locked in an increasingly bloody struggle with the Nigerian authorities since it was founded in 2002, the BBC reports.
The group, which calls for a strict Islamic state, carried out a suicide attack in August on the UN headquarters in Abuja, in which more than 20 people were killed.
Nearly 70 people have died this week in fighting between Nigerian forces and Boko Haram gunmen in the north-east of the country.
