More than 50 tires were dumped in Cottage Grove and Woodbury last weekend.
The tires were discarded in two locations along Military Road.
“I think we have a serial tire dumper here,” said Cottage Grove Police Chief Pete Koerner.
About 30 tires were found in the 9200 block of Military Road in Cottage Grove, and another 24 at Bailey Road in Woodbury.
“It’s a huge nuisance,” Koerner said.
The cities’ public works employees removed the tires.
According to the Woodbury Police Department, no witnesses or suspects have been identified.