A week after a Michigan sheriff warned that burglaries had ticked back up at high-end homes in metro Detroit, another local police agency is reporting more instances of robberies in Southeast Michigan.

This time, Northville Township authorities are asking homeowners to be aware of an organized crime group targeting big homes in neighborhoods. 

A news release from the police says law enforcement believes the group is from South America. At least five home invasions have occurred in the past year with each case showing "striking similarities."

The groups operate in teams of three to four people who coordinate their operations. Their methods involve parking on a nearby side street away from a home before breaking in. They're often after high-value items like cash and jewelry.