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CHICAGO – Chicago police are warning Near North Side residents about a string of car thefts involving catalytic converter parts. 

The converter regulates a car’s exhaust emissions. 

According to police, there have been six recent thefts or attempted thefts. Police said the thefts likely involved three suspects.

The suspects allegedly arrive at the scene of a parked vehicle and cut off the catalytic converter from the victim’s vehicle. 

The warning comes six days after a Lakeview resident caught suspects in the act and killed one of the thieves.