MIDLAND, Texas (AP) — A west Texas oilfield services company donated the truck war veterans were riding on when a train plowed into them, killing four people.

The National Transportation Safety Board announced Sunday that Midland-based Smith Industries was the owner of the truck. Four war veterans were killed when a train struck the truck during a parade in Midland on Thursday.

According to its website, Smith Industries sells and manufactures oilfield service equipment. The website says the company provides steel and fiberglass tanks, separators, ladders, walkways and other equipment. The company has been in operation since 2000.

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

Midland is in Texas’ oil-rich Permian basin, which has experienced a significant oil boom in recent years.