If you dont have an animal control to call, and you are NOT in the city limits, and you are BRAVE, and you KNOW your neighbors (talk to them prior to doing the deed), then the .22 Short from a rifle will do wonders.
Trap them as mentioned above. Make sure your "kill shot" gets the head and not their back end!!! Be quick with it and get it into a garbage bag ASAP and tied tight in case the glands release some stink.