NEW DELHI: Six coaches of the Jaffar Express were derailed on Wednesday after a bomb exploded near a railway track in Pakistan’s Jacobabad district in Sindh province, which borders restive Balochistan. No casualties have been reported so far.The blast occurred near a cattle market in Jacobabad, causing six bogies of the Quetta-bound train to go off the rails. Police and paramilitary forces rushed to the scene and cordoned off the area. Authorities said an investigation is underway to determine the nature of the explosion and identify those responsible.Train operations on the route have been suspended temporarily.This is the second time the Jaffar Express has been targeted in recent months. In March, it was attacked in the Bolan district of Balochistan while travelling from Quetta to Peshawar. The Balochistan Liberation Army (BLA) had claimed responsibility for that incident and briefly hijacked the train before a military rescue operation was launched.No group has claimed responsibility for Wednesday’s blast so far.