Investigators examine track 'anomalies'

Investigators probing a deadly train crash near the Washington-Maryland border are looking more closely at a stretch of track near the wreck site after finding abnormalities yesterday in equipment that senses trains and transmits speed commands.

Debbie Hersman of the National Transportation Safety Board said five of six circuits, or stretches of track, in the crash area recognised a device that simulates the presence of a train. But she said there were anomalies with the sixth circuit.