NEW YORK (AP) - Metro-North Railroad officials say they'll review safety recommendations made by federal investigators after a commuter rail crash that killed six people, including a Danbury man, in a New York City suburb in 2015.

A U.S. official told The Associated Press on Monday that National Transportation Safety Board investigators have concluded an unusual rail design contributed to the death toll. The official says about 340 feet of electrified rail pierced a Metro-North train after it struck an SUV at a crossing in Valhalla, New York.

The official wasn't authorized to discuss the investigation and spoke to the AP on Monday on the condition of anonymity.

The Metropolitan Transportation Authority operates Metro-North. Spokesman Aaron Donovan says the agency looks forward to the NTSB's findings being presented at the board's meeting Tuesday in Washington.