An apparent hit-and-run on Tucson's south side has left a pedestrian with life-threatening injuries, police say.

Here is the news release issued at 8:30 p.m. Thursday by Sgt. Chris Widmer, a police spokesman:

At about 6:30pm, Tucson Fire Department and Tucson police responded to a man down at Liberty/Drexel. Upon arrival, they located an adult male (believed to be between 30 and 40 years of age) with life-threatening injuries on Drexel west of Liberty. It appears to be a hit and run pedestrian accident based on witness accounts. The vehicle fled westbound on Drexel. The only description given is "possibly a dark colored sedan". The victim was transported to a local area hospital. Traffic detectives will be on scene for several hours. No further info at this time.