Authorities found almost four tons of marijuana with a street value of $3.6 million floating in the ocean off Dana Point, California, on Sunday.

Boats from the Border Patrol, the U.S. Coast Guard and the Orange County sheriff's office were involved in recovering the 160 bales of marijuana, according to a report from CNN affiliate KCBS.

A tip led authorities to the marijuana floating in the Pacific Ocean about 13 miles off Dana Point, the station reported.

Border Patrol spokesman Michael Jimenez told the Orange County Register that the fact that the pot was found with no suspected drug boats in the area was unusual.

"At other events, they've dumped the bales to get rid of weight if they're being chased. Generally in these cases we're aware they're being dumped. What's more unusual is that the bales were floating with no boat in sight," the Register quotes Jimenez as saying.