CLEARWATER — Two law enforcement agencies are investigating the Tuesday night crash that injured a Clearwater police officer and two civilians.Largo police are investigating the crash itself, which occurred about a mile into the city at Rosery Road and Clearwater-Largo Road. Clearwater police commanders are investigating the circumstances that led up to the crash and whether the officers involved in the incident acted within department policy.The incident started when a Clearwater officer saw a stolen car driving south on S Missouri Avenue toward the Clearwater-Largo border, officials said. The officer, whose name was not released by the agency, attempted a traffic stop but the car drove off.Soon after, Myers was driving his Clearwater police vehicle west on Rosery Road to help out the unnamed officer.At the same time, Zoe Applegate, 20, was driving a 2015 Chevrolet Cruze south on Clearwater-Largo Road with a passenger, 21-year-old William Tyler Gable. Myers’ police vehicle and the Cruze collided at 9:52 p.m. in the intersection, police said. Officials did not say who was at fault.Myers, who has worked for the agency since 2007, was treated at Morton Plant Hospital and released Wednesday morning. His police dog, Axe, was checked out and cleared at an animal hospital.Applegate and Gable were reported to be in stable condition Wednesday morning at Bayfront Health St. Petersburg.Citing the internal investigation, police officials did not release any other information about the incident. All they said was that the civilians involved in the crash were not connected to the stolen car.