A pregnant woman and her unborn child were killed in a road-rage crash Saturday morning, and the driver whose truck they were riding in was arrested on suspicion of driving under the influence, Long Beach police said.

Police said the incident began around 11:30 a.m. Saturday when 26-year-old Miguel Larios was driving a GMC pickup truck southbound on Long Beach Boulevard in North Long Beach “at a high rate of speed.” The woman—who was about eight months pregnant—and a 10-year-old boy were riding in the truck with Larios, police said.

Larios “was involved in a road rage incident with a second vehicle for several blocks as the driver of the second vehicle attempted to disengage from the road rage incident,” police said.

During the road rage incident, Larios collided with an uninvolved Toyota Corolla whose driver was trying to pull away from the curb near Mountain View Street and Long Beach Boulevard, according to police.

After the collision, Larios “lost control of his vehicle and struck a parked, unoccupied pickup truck just north of 52nd Street,” police said in a news release.

First-responders rushed Larios and his passengers to the hospital after the crash, police said. He and the 10-year-old were suffering from non-life-threatening injuries, but the woman and her unborn child suffered critical injuries, police said.

She and her unborn baby died at the hospital, police said.

“At this time, the female is only being identified as a 23-year-old resident of Long Beach pending notification to the next of kin by the Los Angeles County Coroner’s Office,” police said in a news release.

Police said they arrested Larios on suspicion of two counts of gross vehicular manslaughter while intoxicated, one count of driving under the influence and one count of child endangerment. Police said he was held on $200,000 bail.

Police asked anyone with information about the crash to call detectives Joseph Johnson or Kelsey Myers at 562-570-7355. Anonymous tips may be submitted through Crime Stoppers by calling 1-800-222-TIPS or visiting www.LACrimeStoppers.org.

Jeremiah Dobruck is managing editor of the Long Beach Post. Reach him at [email protected] or @jeremiahdobruck on Twitter.