by Hauwa Gambo

The Al-Jazeera update on twin attacks in Jos, the capital of Plateau this morning:

A suicide bomber has blown himself up outside a church in the central Nigerian city of Jos, witnesses said, while gunmen also attacked a church in the country’s northeast.

The blast happened on Sunday morning at an evangelical church in the city of Jos, a restive city on the dividing line between the nation’s Muslim north and Christian south, causing unknown injuries.

Police have not yet commented on the apparent attack.

There was no immediate claim of responsibility, although attacking churches has become a trademark tactic of Boko Haram, an armed group that seeks to impose Islamic law in Nigeria.

Meanwhile, gunmen opened fire on a church in northeastern Nigeria on Sunday, spraying the congregation with bullets and killing and wounding many of them, witnesses said.

“Three gunmen came to the premises of the church and started firing at people outside the church before going into the main building to carry on their killings … Many people have been killed and wounded,” said witness Hamidu Wakawa, who was at the church in Biu Town, Borno state.

Police said they did not yet have any details on the attack.