Two horses running behind a horse trailer on Argent Road and Road 68 in Pasco caught people by surprise Tuesday afternoon.
The horses were tied to a trailer that was being pulled by a truck, said Gene Weisskopf, of Richland, who was at McGill's restaurant and saw them at the stop light.
"The light turned green and (the driver) kind of crept forward and then he turned left on Road 68 and started picking up speed," Weisskopf said. "The horses started trotting and then running. One of them broke loose and kept running with the other horse that was still tied up."
Pasco police said the owner of the horses had just been at a veterinary clinic nearby and forgot that the horses were tied outside the trailer. He stopped after multiple cars honked at him to alert him what was happening.