(Photo: iStockphoto.com)
A Denver medical marijuana dispensary at the center of a federal investigation has been raided again.
 
U.S. Attorney spokesman Jeff Dorschner confirmed that Wednesday morning's raid of VIP Cannabis was part of an ongoing investigation. Four men associated with the business have been indicted on international money laundering charges.
 
Prosecutors allege they diverted hundreds of thousands of dollars from Colombia to buy a Denver grow house. Court documents remain sealed.
 
One of the suspects, Hector Diaz, appeared in federal court Wednesday to be advised of the new charge. He pleaded not guilty and is free on bond.
 
Two other men arrested last week remain in custody. The fourth is still at large.
 
Video and photos from KUSA-TV during the raid showed firefighters breaking into two safes in the parking lot.