Buffalo Police are looking for at least two men who posed as utility workers to get into a Normal Avenue house Thursday afternoon.
The victims said they the men claimed there was a gas leak in the house and let them in.
Once inside, the suspects tied up one of the victims and struck him, causing facial injuries that required treatment at the Erie County Medical Center.
One of the suspects was described as a bald, black man who is about 6 feet and one inch tall and weighing about 180 pounds.
Homeowners should use extreme caution when strangers come to their doors, said police spokesman Michael J. DeGeorge. People should always ask for proper identification and call 911 if the person is uncooperative.
DeGeorge said police have leads to the suspects in the Thursday home invasion and are continuing an investigation.