The National Transportation Safety Board is combing through the cellphone records of the engineer at the controls of the crashed Amtrak train — and said he was using it the day of the deadly derailment, the agency said in a statement Wednesday.

“Although the records appear to indicate that calls were made, text messages sent, and data used on the day of the accident, investigators have not yet made a determination if there was any phone activity during the time the train was being operated,” the NTSB said.

The board will be checking the time stamps on Brandon Bostian’s phone to see if he was using it just before the crash that killed eight people and injured over 200 more.

There were no issues with the train’s signals systems at the time, the NTSB also said.

Investigators have also interviewed the engineer of the SEPTA train that came to an emergency stop when it was struck by an object. That motorman said Bostian announced on the radio, “hot track rail two” to warn him that he was about to pass the train.

“He saw Amtrak 188 pass on track 2 and did not notice anything unusual,” the NTSB said in the statement.

Probers will continue interviewing passengers and first responders in the coming weeks.