NEWFANE, NY -- The Niagara County Sheriff's Office warned residents in Newfane to stay inside and lock their doors Saturday night following a home invasion.

Sheriff's deputies placed a reverse 911 call after responding to a call on McClew Road around 10 p.m. Residents told deputies that an adult couple had entered their home through an unlocked kitchen door and demanded money.

A white male believed to be in his mid 20s threatened the homeowners with a black handgun. He is described as being about 5' 5" tall, weighing about 200 lbs. He had dark-colored eyes and was wearing a tan dress coat and a tan bandana covering his face.

The second suspect is a white female, about 20 years old, 5' 8" tall with a thin build. She was wearing a dark-colored coat and a brown or tan dish towel over face. She was not armed, witnesses said.

The suspects left without any money and the homeowners were unhurt.

The sheriff's office put out an alert online and sent phone messages to homes as a precaution, according to a statement released Sunday afternoon. The alert said, "The Niagara County Sheriff's office is investigating a possible home invasion in your area. We advise you to stay inside and lock your doors."

Deputies searched the home and the neighborhood throughout the night but didn't find the suspects. A sheriff's office K-9 followed a trail that ended near a home on the edge of McClew Road, the statement says. The suspects may have left in a waiting car, but that has not been confirmed.

Sheriff's deputies say that there have been several armed robberies of retail establishments in Niagara County in the past three weeks and several extra sheriff patrols were on duty when this crime occurred. They don't know if the robberies are connected to Saturday's home invasion.

Anyone with information is asked to call the Niagara County Sheriff's Office at (716) 438-3394.