Colorado authorities are beginning a search for a 6-year-old boy who was thought to be inside a runaway homemade balloon.
After flying for more than two hours, the balloon landed in a Colorado field. It was immediately surrounded by as rescue crews, but no one was inside of it.
Cathy Davis of the Larimer County Sheriff's Department told reporters the balloon was owned by the boy's parents and tethered behind the family's home. She said two sons were playing outside when the older boy saw the younger one go into a compartment at the bottom of the balloon and fly away.
The balloon was airborne for more than two hours.
-CNBC.com contributed to this report.