The attack comes after warnings against viewing the event at public venues.
CNN reports that an explosion at a Nigerian World Cup viewing center on Tuesday has left 21 dead and 27 injured according to a hospital source.
The number conflicts with a police report claiming 10 had died, but the hospital official claims that this doesn’t account for bodies not taken to the morgue.
Security experts warned of attacks from Islamic militant groups directed toward World Cup spectators in public venues.
According to CNN, Boko Haram, the Islamic extremist group linked to the abduction of 300 Nigerian girls, are believed to have sent warnings to viewing centers advising that they not open during the World Cup
"We suspect these letters to be from Boko Haram. People are very afraid and are not leaving their homes,” said local officials in Madagali, Maina Ularamu.
The fear of attacks such as this has been linked to lower bar attendance numbers for the World Cup games. During the opening game, fewer than 50 people watched the event at Freedom Park in Lagos, Nigeria.
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(Photo: AP Photo/Adamu Adamu)