COEUR D'ALENE, Idaho (AP) — Officials in northern Idaho are stumped by how and why a bicycle keeps ending up 60 feet into the same tree.

The Coeur d'Alene Press reports that for more than a decade, about once a year, employees with the Coeur d'Alene Parks and Recreation Department speculate as to who and why a bike is hoisted into the same tree.

Urban Forestry Coordinator Katie Kosanke says the recurring prank may seem harmless, but it is actually a safety hazard and bad for the tree.

The city's cherry picker does not reach the location of the tree where the bike is often chained. In the past, Kosanke says they've had to call the fire department or use private contractors to get the bike down.