According to the KVIA-TV station, citing the El Paso County Sheriff's Office, the incident took place at around 6.30 p.m. Sunday (00:30 GMT Monday) at a Fabens racetrack. A total of 29 people received injuries.
"The preliminary investigation revealed one of the vehicles due to unknown reasons left the mud-track striking and breaking through a guard rail. Three other vehicles were also struck as a result of the initial crash", the Sheriff's Office said, as quoted by the broadcaster.
Eight of those injured were taken to hospitals, including three in critical condition.