HELENA, Mont. — Federal agents and local authorities have raided medical marijuana operations in four Montana cities. HELENA, Mont. — Federal agents and local authorities have raided medical marijuana operations in four Montana cities.

Authorities from the Drug Enforcement Administration, the FBI, Lewis and Clark County sheriff's office and Helena police watched over at least eight people in handcuffs outside Montana Cannabis west of Helena Monday afternoon. The greenhouse is the length of half a football field and packed with marijuana plants.

A spokeswoman in the U.S. attorney's office in Montana says the federal agents executed search warrants that are under seal. Victoria Francis said she could not release any more information.

Montana Cannabis co-owner Christopher Williams told The Associated Press that raids were taking place at other businesses he co-owns — Big Sky Patient Care in Bozeman, at MCM in Belgrade and Good Medicine Providers in Columbia Falls.