QUETTA - At least three people were killed and four others wounded in a firing incident in Hub industrial town of Balochistan on Wednesday night. According to police sources, a scuffle occurred between shopkeeper and a customer at Sakran Road of Hub over a petty issue and later unidentified people opened indiscriminate firing in the area. As a result, three people including Ahmed Khan and Wazir Khan were killed on the spot while four others sustained serious injuries. The injured who were identified as Peer Bakhsh, Nazeer Muhammad, Mir Muhammad and Saleh Muhammad Marri were rushed to nearby hospital for first medical aid and later shifted to Karachi for further treatment. Police has registered a case and started investigations.