QUETTA - Four people including a tribal elder were injured when an explosive device went off in Sui Bazaar area of Dera Bugti district on Sunday. The Baloch Republican Army claimed the responsibility of the blast. According to Sui police, an unknown person having a motorbike came at poultry shop at teshil bazaar Sui, parked his motorbike in front of shop and left. Few minutes after his departure, the motorbike blew up with a huge explosion. Resultantly, four people including shopkeeper Zahoor Ahamd and four others identified as Taj M Mondrani, Khair M, Yousaf and Sharif received injuries in the blast. The injured were rushed to the nearby hospital where the condition of Zahoor Ahmad was stated to be critical. Police have registered a case against unknown persons and started investigation. Meanwhile, spokesman of Baloch Republican Army (BRA) Sarbaaz Baloch calling from unidentified place claimed the responsibility for the blast. He said the target of remote control blast was Taj Muhammad Mondrani, who according to him was working against interests of Balochs.