Incidents have been been reported across town. We're told officials are looking into each tagging case to see if they are gang-related.
A similar spike of graffiti cases happened a few years ago but stopped when police made several arrests. Authorities are now hoping to replicate that success this time around.
"My word to these guys and gals is they got to be careful with what they're doing. I'm not encouraging them to do it - they're going to get caught. It's just a matter of time," said Kennewick Police Officer Craig Hanson.
It's now the police's responsibility to track if the recent increase is caused by the same group.