The rail link between Quetta and the rest of the country was cut off on Wednesday after a main track was blown up near the city, railways officials said. The early morning blast at the track at Speezand, some 20 kilometres from Quetta, blew up a two-foot part of the track, they said. Two scheduled trains, Chiltan Express and Quetta Express, leaving from Quetta were delayed and two other trains, Jaffar and Bolan Express, also had to be stopped. Railway engineers had started repair work on the damaged track and officials said it would take some time to restore the service. The bomb disposal squad is investigating the matter, officials added.