Police say a woman with a gun held up a Speedway gas station and took off in Lake Ronkonkoma.

Surveillance images show the woman wearing jeans and a dark shirt at the location on Portion Road around 11 p.m. Monday. 

According to police, the suspect pulled out what appeared to be a gun, demanded cash and then ran off with the money.

Anyone with information on her whereabouts is asked to call Suffolk Crime Stoppers at 1-800-220-TIPS.