A former doughnut shop in Dunnellon was being used as a front to manufacture synthetic marijuana, known as K-2, and drug agents seized enough materials to fill a 26-foot truck, according to the Marion County Sheriff's Office.

[PHOTOS:  Agents make major drug bust in Marion County]

Acting on an anonymous tip, agents raided Sunrise Donuts & Coffee at 10155 SW Highway 484 late Monday night, leading the arrest of 3 men. 

Ahmad Khaled Ahmad Warayat, Fares Rabah and Ahmed Mohsin were being questioned by detectives after being arrested in connection with the drug bust.

The business, which has been closed for months, was converted into a "complete K-2 manufacturing setup," deputies said.

Deputies said an estimated $350,000 worth of K-2 was confiscated in the bust.

No other details were immediately released.