At least 11 people have been killed in religious violence in the Nigerian town of Jos. A car bomb exploded outside a Catholic church in the middle of mass.

The attack is similar to one which took place one two weeks ago, in which militants from the Islamist sect Boko Haram killed three people in the same city. The group says it is behind a wave of bomb attacks on churches across Nigeria since Christmas Day. Mark Lobel reports from the country's Imo state.

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