Unidentified men on Monday blew up a portion of Pak-Iran railway track in Dalbandin, the district headquarters of Chagai, said police sources.
They planted an explosive device in the Eastern Bypass area of Dalbandin and detonated it.
As a result, about one foot portion of the track was damaged; the police said.
The law-enforcement agencies personnel, including Frontier Corps and police rushed to the site and cordoned off the area. Further investigation is underway.