LAS VEGAS (KLAS) — Impairment and speed were suspected in a deadly crash Sunday night that left two young children dead and two women seriously injured, North Las Vegas police said.

The crash was reported around 9:16 p.m. in the 5000 block of North Scott Robinson Drive, near West Lone Mountain Road and Clayton Street.

Police said the two children, believed to be toddlers, were not wearing age-appropriate child safety restraints.

“Due to the improper restraints, it resulted in one toddler being decapitated,” according to a news release from police. The second child, a girl, died at the hospital.

The Honda mini-van, driven by a woman in her 20s, veered off the road, sideswiped trees, hit a light pole and a wall, and then struck a palm tree head-on, according to police.

North Las Vegas police released a video of the scene, showing the path of destruction as the mini-van lost control.

The driver was arrested. The passenger, who was also injured, was a female. Police have not yet been able to identify her age.

Both women were still in the hospital Monday afternoon, police said in a 3 p.m. news conference.

North Las Vegas police urge anyone traveling with children to protect them by making sure each child is secure in a correct car seat for their age, height, and weight. They also are reminding the public of the importance of driving while sober and not speeding.

“This is a call to action about DUI, speed, and proper child restraints… Driving after drinking is deadly… these things are very avoidable,” said NLVPD Public Information Officer Alexander Cuevas. “A regular car seat is not to be used for a child.”

The names of the children will be released by the Clark County Coroner’s Office. No other details about the crash were provided.

Anyone with information about the incident is urged to contact North Las Vegas police at 702-633-9111. To remain anonymous, call Crime Stoppers at 702-385-5555.