Milwaukee police are warning residents about a string of burglaries involving improperly installed window-mounted air conditioners.

Charlotte Brown, the Milwaukee Police Department's District Three Community Liaison Officer, said 38 burglaries have been reported since July 1 involving air conditioners that weren't properly bolted into place being removed to allow access into the homes, the Milwaukee Journal-Sentinel reported Friday.

Police spokeswoman Anne Schwartz said 11 of the incidents involved the air conditioners being stolen as well. Police said stolen air conditioners can be sold for a little as $10 on the streets.

Brown recommended residents ensure their air conditioners are properly bolted into place or remove the units before leaving their homes for the day.