DOVER, Del. -- Delaware State Police said they are looking for three people who reportedly pretended to be caseworkers from child protective services.

The incident happened Friday at a home on South Old Mill Road around 11:22 a.m.

According to state police, one woman and two men went up to the home and told the woman who lived there that they were from child protective services and needed to check on her child.

The homeowner said the three people couldn't provide credentials or proof of identification. DSP said the female suspect showed paperwork with the woman's child's name on it, but wouldn't show the woman the full paperwork.

DSP said the two men wore handguns in their waistbands and took picture's of a car that was parking the driveway.

The woman said she was suspicious, and told the three suspects she was going to call police. The three people took off, DSP said. The woman then called the Division of Family Services, who confirmed with her that the state did not send any caseworkers to her home.

The female suspect was described as white, about 30 years old, wearing a blue suit, and driving a white, Nissan sedan. The first man was described as white, middle aged, and wearing an all-black button down shirt. The second man was described as black, 20 years old, and wearing all black. Both men drove off in a black, Chevrolet Tahoe.

The investigation is ongoing. Police ask anyone with more information to call Troop 3 at 302-698-8453, or to contact Delaware Crime Stoppers at 1-800-TIP-3333.

State police said anyone who works for the Division of Family Services will show an official state-issued ID card when on official business. There is also a hotline, 800-292-9582, where you can call to verify the identity and authenticity of the visit. In Delaware, the agency is called the Division of Family Services, when its often called Child Protective Services in other states.