Federal agents along with local Denver police conducted multiple raids on marijuana growing operations around Colorado's capital city Tuesday morning.

The Denver Police Department declined to speak about the details of Tuesday's raids, citing an ongoing investigation, but tweeted this statement:

ALERT: Area law enforcement are conducting an ongoing investigation involving illegal drug activity. No further info at this time. #Denver

— Denver Police Dept. (@DenverPolice) October 28, 2014

The Denver Post reported that the operation involved the Drug Enforcement Administration, the Denver Police Department and the Colorado Attorney General's Office.

"It's a very large and successful investigation," James Gothe, DEA group supervisor in Denver, told The Denver Post. "We're assisting."

Tak Landrock of Denver's Fox31 reported that cars, cash and marijuana plants were seized at six locations in Denver.

Calls to the DEA and the Colorado Attorney General's Office were not immediately returned.

It remains unclear why the police action was conducted http://www.huffingtonpost.com/2014/10/28/denver-marijuana-raid_n_6063066.html