The targets have included a beads store, a pizza shop, a breakfast restaurant and a motorcycle shop, most in the middle of the night.
Investigators believe the break-ins are related, according to a city news release sent Monday. The suspects are gaining access by using bricks or rocks to smash doors and windows.
One suspect, described as a stocky white man, has been seen wearing running suits and baggy pants.
The burglars are looking for cash registers but will settle for stealing merchandise, according to the release.
Police believe the burglaries in Arlington could be connected to additional cases, including some in Mount Vernon.
Anyone with information should call 360-403-4609.
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