× Thanks for reading! Log in to continue. Enjoy more articles by logging in or creating a free account. No credit card required. Log in Sign up {{featured_button_text}}

The Washington State Patrol bomb squad was called Monday to investigate a suspicious device that turned out to be a geocaching find north of Castle Rock.

Geocachers are hobbyists who employ coordinates and clues posted on the Web to find specific locations using global positioning system devices. The locations are usually marked with a symbol, trinket or note.

The Cowlitz County Sheriff's Office said a deputy was investigating a report of a suspicious car Monday morning when he came across a microwave tucked into a tree near Hog Island, which is along the Cowlitz River near West Side Highway. The appliance appeared to be plugged in, said Chief Criminal Deputy Charlie Rosenzweig.

The deputy called in the bomb squad, which arrived around 1:30 p.m., Rosenzweig said. In a statement issued Monday, the bomb squad said it used a jet of water to remotely open the microwave's door. Inside it found a Tupperware container with a geocache sticker.

"The WSP bomb squad understands that geocaching is a worldwide hobby, and we would ask that all geocache items are properly marked with the green geocache organization sticker on the outside container," the statement said.