By Frank McGurty NEW YORK (Reuters) - Federal investigators are analyzing the cell phone records of the engineer in last week's deadly Amtrak derailment to determine if he was making calls or texting when he was operating the train, officials said on Wednesday. Investigators are aware that engineer Brandon Bostian made calls and texts on the day of the May 12 crash in Philadelphia that killed eight and injured more than 200, but do not yet know if any of the activity was during the time he was operating the train, the National Transportation Safety Board said. Amtrak engineers are required to turn off their phones when behind the controls, officials have said.

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