Jos - Witnesses say four people were injured in an explosion at a bar where people were watching a soccer game in a central Nigeria city long plagued by religious and ethnic unrest.

The blast happened on Tuesday night in Jos, which sits on the fault line between Nigeria's largely Christian south and Muslim north. Witnesses said the blast struck the bar where people had gathered to watch a Champions League soccer match between Barcelona and Chelsea.

Police and military officials could not be immediately reached for comment on Tuesday night. Similar blasts have struck areas where people gather to watch soccer matches in Nigeria in the past.

Jos, the capital of Nigeria's Plateau state, is in the “middle belt,” where dozens of ethnic groups vie for control of fertile lands and political and economic power. - Sapa-AP