Three 20-something Pacific Beach men have been arrested and booked into the San Diego Central Jail.

It is believed the trio shipped tens of thousands of dollars worth of marijuana every week to customers throughout the United States.

A representative close to the case said the men shipped between 15 and 20 pounds of pot every seven days.  The defendants are believed to have pocketed as much as $30,000 each week for those efforts.

Their La Jolla Boulevard homes were searched earlier this week.  A warehouse in the Midway district was also searched.

Authorities said that when they executed that search warrant they stumbled upon an elaborate grow house operation.  More than 400 plants and $500,000 in assets have been seized thus far.  These assets include firearms, bars of silver, cars, bank accounts.  Ammunition was also found in one man's apartment.

Neighbors said they were unaware that the people next door were running such an elaborate interstate operation.  They said they were shocked to walk out their front doors to see multiple cop cars parked on the street.

Those officers were fully decked out in SWAT gear, they said.   No one ever expected to learn that these young men were involved in this type of business.

Defendants Chris Gillin, Matthew Schneider and Kyle Gillen reportedly used the US Postal Service to mail packages to Wisconsin, West Virginia, Pennsylvania, New York,  Texas, Florida and New Jersey.

A representative from the Chula Vista Police Department said that customers also used the USPS to send large sums of cash to their dealers.

The arrests were the result of a year-long investigation, they said.   Many law enforcement agencies, including the Chula Vista PD, the USPS, the Anti-Money-Laundering Unit, SDPD, San Diego County Sheriff's Department and the National City Police were involved.

The defendants are currently being held at the San Diego Central Jail in lieu of $150,000 bail each.    They each fact charges relating to money laundering, conspiracy, possession of marijuana for sale and marijuana cultivation.

Investigators said they were initially tipped off when the USPS learned large packages of money was being shipped to these men from multiple addresses on the East Coast.  This is how the Anti-Money-Laundering unit became involved.  Police surveillance quickly led them to the grow house.

It is believed the defendants shipped more than 150 pounds of weed in the past year.   The Gillen brothers are described as being college students who grew up in New Jersey.  Schneider was born and raised in San Diego.

If the men are convicted they could be sentenced to multiple years in prison.

They are all due back in court later this month.