Rochester, MN (KROC AM News) - A rather unusual drug bust in Rochester Thursday.

Officers raided not one, not two, not three but four apartments as part of an investigation into methamphetamine use and sales.

Capt. John Sherwin says the apartments are located at 540 Northern Hills Dr. NE. Search warrants were executed at apartment numbers 50,51,54 and 60 and an unknown amount of meth was seized.

Arrested were: 28-year-old Tyler Engelking-Mayer, 30-year-old Ashley Reinhardt, 49-year-old Jason Vadner and 41-year-old Shelly Barbian.

Sherwin says the so-called “drug dens” had been used frequently by drug users and sellers.

News update:  State of emergency declared in Cannon Falls.