Updated

Organizers of a parade in West Texas in which U.S. military veterans were killed when a train plowed into a truck had been using the same route for three years.

National Transportation Safety Board spokesman Mark Rosekind made that announcement Sunday.

Four war veterans were killed during the parade in Midland on Thursday.

Rosekind identified the company that donated the truck as oilfield services company Smith Industries. He said the company is cooperating with investigators.

Investigators have not released the identity of the driver. Rosekind say they expect to interview the driver on Monday.

According to its website, Smith Industries sells and manufactures oilfield service equipment.

Rick B. Smith, Smith Industries' CEO and president, did not immediately respond to phone calls or emails seeking comment.