Jos Boko Haram
A second bombing has occurred in the Nigerian city of Jos, just days after 130 people were killed by twin car bombs. Twitter / @ayRiley / Ayomikun

Many people are feared dead after an explosion in the Nigerian city of Jos.

The incident occurred at an open air venue, where soccer fans were watching the Champions League football final.

An official of the National Emergency Management Agency said there are fears of many fatalities as the outdoor theatre was packed to capacity.

The latest incident is believed to be another car bomb attack, four days after twin car bombs killed at least 130 people in a bustling market place.

The earlier incident was attributed to Islamic extremist group Boko Haram who have been carrying out urban bombings and rural attacks on north eastern villages, in defiance of an international campaign to release more than 200 schoolgirls abducted by the militant group.

Last week, Nigerian President Goodluck Jonathan joined an international summit in Paris to devise strategy of mutual cooperation between Nigeria and its neighbouring countries who declared "total war against Boko Haram."

The attacks are believed to be an attempt to ignite religious rivalries in the region which is almost equally divided between a mainly Muslim north and predominantly Christian south.

Thousands have already been killed in the 5-year-old Islamic uprising to turn Nigeria into a Muslim state.