Neal Augenstein, wtop.com

HYATTSTOWN, Md. – Coins and bills spilled from an armored truck on northbound Interstate 270 Friday morning, and passersby stopped and scooped them up.

Maryland State Police are investigating how the cash came out of the truck — owned by Garda — shortly after 9 a.m.

Police are asking motorists who helped themselves to the cash to return it to the Rockville barracks.

An eyewitness says it was like a “snow globe of cash.”

Attorney Heather Kelly says she was driving to her office Friday morning when she saw currency blowing around and drivers stopping to grab fistfuls of cash. Kelly says about 30 cars pulled over on both shoulders of the highway.

Quarters lay in the shoulder and travel lanes of the interstate north of the truck weigh station, near exit 22. Police also confirmed bills came out of the truck.

Sgt. Eric Corbin with Maryland State Police said police were still working to figure out how the money came out of the truck.

“There’s no indication he was robbed,” he says.

It’s unclear how much money was involved.

The Associated Press contributed to this report. Follow Neal Augenstein and WTOP on Twitter.

(Copyright 2012 by WTOP and The Associated Press. All Rights Reserved.)