Two men are on the run, after police said they snatched a woman's purse from outside of a west Houston dog salon.
According to Houston police, just after 3:30 p.m., a woman parked her car outside of the dog salon's parking lot on S. Shepherd.
While the woman went inside to pick up her dog, police said two men pulled up in a brown Monte Carlo and snatched her purse from her car.
When the men tried to pull away, the car got trapped in the parking lot by a bus as a witness on foot tried to intervene, police said.
The suspects then put vehicle into reverse, bumping the good Samaritan, police said.
Police are investigating the incident as an aggravated robbery.
Investigators said they are sifting through surveillance video, but they are not sure what it shows.
The person who tried to stop the robbery was not seriously injured.