This article was originally published on The Huffington Post by Lee Moran on March 16, 2017.

Staff at a Washington state thrift shop were stunned on Monday to find $24,000 worth of weed inside a donated cooler.

Police said the workers at the Goodwill store in Monroe were sorting through donations when they stumbled across the marijuana haul.

We went over there and they opened the lid and in there was five large bags of marijuana,” Debbie Willis of the Monroe Police Department told KTLA5. “Normally when we go there, it is for a shoplifter, but not anything like this.”

It’s not clear who dropped the cooler off, or whether they were even aware that they were also handing over 3.75 pounds of pot.

Police said store employees are combing through surveillance tapes for any clues to the person’s identity.

People 21 and over can legally possess up to 1 ounce of marijuana in the state. Cops said this haul will be destroyed, however, as legal marijuana must come from a licensed producer and seller.