A Trinity Railway Express train fatally struck a woman near Haltom Road in northeast Fort Worth on Tuesday night, police said.
Police and emergency personnel were dispatched to Haltom Road and Etsie Street about 8:15 p.m.
The woman was riding a bicycle and walking her dog at the same time when she fell onto the tracks and was struck by a westbound train, said Officer Daniel Segura, police spokesman.
The woman was identified by the Tarrant County Medical Examiner as Kristina Letney, 35, of Fort Worth.
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The Fort Worth Transportation Authority, which oversees the TRE, tweeted that passengers might experience delays due to the accident.