The couple were in a black GMC Yukon on Highway 1 Monday evening when they were hit from behind by a white Chevy truck and pushed into a ditch.
A third vehicle allegedly started the chain reaction, but the driver fled the scene after the truck hit the Chapmans' SUV, the celebrity news website said.
The accident remains under investigation.
The couple starred in the A&E reality series, "Dog the Bounty Hunter," for eight seasons until 2012.
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