Authorities are looking for the cause of a train derailment outside an eastern Pennsylvania city's municipal building. Police said the Delaware-Lackawanna Railroad train carrying lumber and sand used for fracking derailed at about noon Tuesday in Dickson City while heading from Scranton to Carbondale. Ten cars derailed and three tumbled over while a fourth was tilted. Acting police chief William Bilinski said no injuries were reported, although officials were concerned that a twisted rail could break free and hurt someone. A borough clerk said the derailment disrupted some traffic.