Motorcyclist killed after loose tire hits helmet on Colorado Highway

North bound traffic on Interstate 25.(Photo By Cyrus McCrimmon/The Denver Post via Getty Images)

A motorcyclist was killed after a tire broke loose from a vehicle on a Colorado highway. 

The Colorado State Patrol said the crash happened Sunday morning on Interstate 25, near mile marker 154. 

Authorities said a Subaru SUV was traveling northbound when the left front wheel became detached.

The tire bounded and rolled into the southbound lanes where it struck the top of a motorcyclist's helmet on a Harley-Davidson before striking a guardrail. 

The motorcyclist was transported to a local hospital and later died. The driver of the Subaru wasn't hurt. 

Authorities said the investigation is still ongoing. 

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