Four tons of marijuana in large bales were found bobbing off the Southern California coast, and authorities are still trying to determine where it came from.

Harbor patrol agents began receiving tips about "suspicious bales" 13 miles offshore near Dana Point, in Orange County around noon on May 20, according to a report from CBS Los Angeles.

The Coast Guard, Orange County Sheriff's Department and U.S. Border Patrol hauled in some 160 bales or 7,623 pounds of marijuana. Border Patrol agents said the bales had a street value of $3.6 million.

So far, there have been no arrests, and there were no suspect vessels sighted near the area where the dumping occurred.

Border Patrol spokesman Michael Jimenez called the incident unusual in the Orange County Register. Typically, bales are found in the water because suspects and boats fleeing from authorities are in a hurry to get rid of them.

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