So far, the thefts have primarily taken place along the Charles Street corridor, according to an email from Sgt. Stephen Fink. Police have been alerted to the incidents when residents return to their homes and discover the packages are missing.
Because of the nature of the crime, Fink warns that any community could be targeted by the thieves.
There are no suspect descriptions.
Police ask community members to keep an eye out and call 911 if they see someone stealing a package. Descriptions of the thieves and any possible vehicles "would greatly benefit our investigations," Fink wrote.
Police urge residents to not put themselves in harms way.