Federal investigators looking into the crash of an Amtrak train last month said Wednesday there was no indication the engineer was talking on his phone or texting.

Amtrak records also show that the engineer, Brandon Bostian, did not access the train's Wi-Fi system while he was operating the locomotive, the National Transportation Safety Board said.

Eight people were killed and more than 200 others were injured when the train derailed on its way from Washington to New York on May 12. Investigators have said the train took a 50-mph curve at 106 mph.

Bostian was injured in the crash and told investigators he did not remember it. His lawyer has said Bostian kept his phone in a bag and used it only to call 911 after the derailment.

In a statement, the NTSB said it was still investigating: