Bomb Blast hits Word Cup Viewing Centre in Damaturu, Yobe State

At least 13 people have been killed in a bomb blast at a venue televising a World Cup match in northern Nigeria, medics say.

Witnesses in Damaturu, in Yobe state, say a suicide bomber in a tricycle taxi detonated explosives as people watched Brazil's match against Mexico.

At least 20 people are said to be seriously injured.

Public screenings of the World Cup in one other Nigerian state have been cancelled due to threats by Boko Haram.

Three areas, including Yobe, are under a state of emergency amid attacks suspected to have been carried out by the Islamist militants.

No group has taken responsibility for the latest blast.A hospital worker told the BBC that truckloads of injured people were being treated in overcrowded wards after the explosion on Tuesday evening.

"The military and police trucks that brought them in have made four return trips so far ferrying them in," the worker said.

"Every single truck was full of the injured. And all of them are young men or children."

The worker said that the injuries suffered by people caught up in the blast were "horrific".

Damaturu resident Mohammed Kurkure Yobe told the BBC that the venue where the attack took place is very popular and often crowded with people watching big events.http://www.bbc.com/news/world-africa-27896257