Naghori escaped unharmed, and the dead included spectators and local residents.
Police said that the bomb was a remote-controlled device.
Pakistan People's Party member of provincial assembly Sania Naz put the death toll at 11.
The injured and the bodies were shifted to Civil Hospital and Jinnah Hospital.
Prime Minister Nawaz Sharif and Sindh Governor Dr Ishrat ul Ebad Khan condemned the blast.
Local media said that the people were leaving after a football match between two local teams of children at about 2.40 a.m. just when the bomb went off at the football ground.
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