MUSKEGON, Mich. (WOOD) — The owner of a marijuana shop in Muskegon says his store was broken into two times in as many days, with the thieves making off with about $20,000 in merchandise.

It happened as Sticky Muskegon on Peck Street south of E. Laketon Avenue.

Surveillance video time-stamped just before 6:30 a.m. Sunday shows four people, their faces obscured by hoods and masks, pull up to the back of the shop. They forced the back door using a crowbar. They grabbed boxes and bags from the back room and loaded them into the back of the SUV. They were gone in less than 3 minutes. Sticky owner Jake Abraham told News 8 they stole about $14,000 worth of stuff.

Abraham said he reported the theft to the state and reinforced the back door.

Video of the second break-in was time-stamped just after 3:45 a.m. Monday. Abraham said because thieves couldn’t get in through the newly reinforced back door, they smashed out a window and jumped through. Surveillance video shows four people pull items from displays and then leave through the window — in and out in less than two minutes. Abraham estimated they took about $5,000 in merchandise.

The Muskegon Police Department said a total of four marijuana stores in the city have been broken into in recent weeks. They provided still images from surveillance video at Sticky and another marijuana shop, Jars.

In two instances, police said, officers interrupted the break-in or got there as the thieves were fleeing.

The suspects are driving cars that were stolen outside of the city, Muskegon police said. They said they’re working with the state and police in Grand Rapids and Battle Creek to investigate.

Anyone with information about the break-ins can contact Muskegon police at 231.724.6750 or Silent Observer at 231.722.7463.