In scenes reminiscent of a Hollywood movie, drivers on a Southern California highway have scrambled to grab piles of banknotes after bags of money fell out of an armoured truck.
The incident occurred shortly before 9.15am local time on Friday on Interstate 5 in Carlsbad as the truck was heading from San Diego to an office of the Federal Deposit Insurance Corporation, authorities said.
"One of the doors popped open and bags of cash fell out," California Highway Patrol Sergeant Curtis Martin said.
Several bags broke open, spreading money – mainly $US1 and $US20 bills – across the road and bringing the freeway to a chaotic halt, Mr Martin said.
Video posted online showed some people laughing and leaping around with their hands full of wads of cash.
Demi Bagby, a San Diego-based fitness influencer, posted a video on Instagram about the wild scenes.
"This is the most insane thing I've ever seen," she says in the video.
"Look at the freeway right now. Oh my gosh."
She notes "literally" everybody stopped to pick up the cash strewn across the road.
Travis Fisher, who was driving on the road, told Fox 5 it was a "sea of money".
"People were celebrating and saying, 'it's cash, it's cash'," he said.
Two people were arrested at the scene, and Martin warned any others who were found to have taken the money could face criminal charges.
He noted there was plenty of videos taken by bystanders at the scene and that the CHP and FBI were investigating.
Authorities did not immediately say how much money was lost.
However, at least a dozen people had returned cash they collected to the CHP by Friday afternoon, the San Diego Union-Tribune reported.
"People are bringing in a lot," Martin said.
"People got a lot of money."
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