Nelson RCMP said in a media release local police are investigating multiple thefts of mail from various locations during the past week.
RCMP said the thefts involve small parcels, cards and general mail being stolen from compartments in community mailboxes located in several areas.
"In order to prevent mail theft, the RCMP are advising the public to pick up mail promptly after delivery and not leave it in the mailbox overnight," the release said.
"If planning a holiday, have someone retrieve mail on a daily basis or, for a fee, Canada Post will hold mail at the delivery office for later delivery."
Police also suggest checking the physical security of the mailbox to ensure there are no gaps or damage and to avoid sending cash or cheques in the mail.
"Also, if there is a damaged or overturned mailbox, contact Canada Post to report it," RCMP said.
"If you possess any information regarding these incidents, please contact your local RCMP office."
Further information and tips regarding mail security can be found at www.canadapost.ca/postalsecurity.
Police said anyone having items stolen should please report to the local RCMP detachment.