Police are looking for a man they say pulled a knife to try to steal a woman's purse in Queens.

It happened Monday near 76th Street and 35th Avenue in Jackson Heights.

Police say a woman was being followed by a man as she walked home.

When she entered her building, they say the man grabbed her from behind and pulled out a knife as he reached for her purse.

The woman fought back and a bystander stepped in and chased the man away.  

The suspect is described as in his fifties and around 5'8" and 200 pounds.

Anyone with information on the case should contact the Crime Stoppers hotline at 1-800-577-TIPS, or text CRIMES and then enter TIP577, or visit www.nypdcrimestoppers.com.