The Washington Post says the operator of a Metro train that crashed into two workers last year was talking on a cell phone at the time of the fatal incident.

Quoting unidentified sources, the newspaper said federal investigators have not yet concluded whether talking on the phone was the cause of the accident. Talking on the phone while operating trains and performing other duties is prohibited by Metro policy.

Greg Hull, head of Security of the American Public Transportation Association, noted concern over the issue of operators talking on the job. Hull says there is no federal standard regulating such behavior; the association is developing its own guidelines.

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