There has been a significant uptick in stolen vehicles and thefts from cars throughout Brookfield over the past week.  Brookfield Police say several vehicles have been stolen and numerous unlocked cars have been entered and items removed. Police say there are a few simple acts that can stop these nighttime thieves, including locking doors, removing keys and placing them in a secure area.  Valuables should not be left in vehicles and anything suspicious should be reported to Police.