A bomb planted near a bus station killed two passers-by and wounded two others in a remote town of restive southwestern Pakistan, police said Wednesday. No one claimed responsibility for late Tuesday's blast in Hub, a town about 600 kilometers (375 miles) south of Quetta, the capital of Baluchistan province and an area police chief Mohammed Akbar Afridi said they were still investigating. «At this stage I can only confirm that two passers-by were killed in the attack, and two others were injured, and we have no information who is responsible,» he was quoted as saying by the Associated Press.