Blast leaves four injured in Chaman CHAMAN: At least four people were injured in a blast on Chaman's Mall Road targeting a law enforcement agency van here on Friday.According to police the blast was carried out through a remote controlled device.Over 10 shops were also damaged due to the explosion, according to Geo TV.The police said evidence were being collected from the site of the blast to ascertain the nature of explosion.The injured were taken to Civil Hospital where medics said two of them were in critical condition.An eye-witness told media that the bomb was planted in a motorcycle.Law enforcement agencies have cordoned of the area following the incident.Over 140 people were killed and many others injured in a blast in Mastung district of Balochistan last week.