As of Wednesday night, they're looking for a gun that was stolen out of one Kennewick house.
In the past two weeks, four homes have been broken into including two on Tuesday.
Checks, electronics, alcohol and jewelry were also taken from the homes.
Police are concerned that there are other guns out there in the hands of criminals.
It's recommended for people to keep an accurate and detailed list of items they own. Write down the serial number along with the make and model of the property.
Police also strongly encourage people to keep all guns locked up and report any suspicious behavior in the neighborhood.