RICHMOND, Va. -- After spotting multiple people allegedly having sex, in broad daylight, on the back porch of a vacant Richmond house, viewers contacted the CBS 6 Problem Solvers for help.

One viewer said her family could not enjoy hanging out in their own backyard because of the lewd activities taking place across the alleyway. The vacant house in question sits near N 21st and T Streets, according to the viewer.

Neighbors and Richmond Police said prostitution is a known problem in that area. Neighbors said it was not uncommon to see people engaging in sexual conduct while sitting inside parked cars on N 21 St.

"I was warned there were a lot of... interesting activities going on in the neighborhood," said one woman who lives near the vacant home. "I've seen cars come by and pick up women. I've seen women leaning on cars trying to attract customers."

To date this year, Richmond Police said they have made 20 prostitution related arrests in the area. It was already considered a "Targeted Enforcement Zone," and Richmond Police have deployed a walking beat officer in the area.

Investigators said anyone who spots suspicious activity in their neighborhood should contact police immediately.

CBS 6 News is working for you. Click here to email a tip to the CBS 6 Problem Solvers. Be sure to include your name, phone number and detailed description of the problem. You can also leave a message by calling 804-254-3672.