ACCRA, Jan.... 23( Xinhua)--At least six people were shot dead and seven others wounded by a group of unknown gunmen on a bus in Ghana's Upper East Region, an official confirmed to Xinhua Tuesday. The victims came under attack Monday while traveling from Bawku, an urban community in the Upper East Region, to a market center in a nearby community, said Hamza Amadu, municipal chief executive for Bawku. Amadu said the dead included two men and four women, and the wounded are receiving treatment at