An injury crash on the southbound 15 Freeway just south of Temecula Parkway slowed traffic on the wet interstate Tuesday.
The tangle involving a charcoal gray Nissan Titan truck and a silver Chevrolet Aveo compact was reported shortly after 11:30 a.m.
Traffic was backed up about one mile and the number four lane was blocked.
The crash vehicles were off to the right-hand shoulder when first responders arrived, although the truck was upside down.
California Highway Patrol Officer J. Serrano said one person who was in the Aveo was transported to a local hospital with unknown injuries.
Rain was falling in the area, but the cause of the crash has not been determined at press time.
“When it rains, slow down and reduce your speeds," Serrano said. --Daniel Lane contributed to this report.