Photo: CTV

Thieves in the Lower Mainland raided mailboxes, apparently using Canada Post keys.

The perpetrators were caught on surveillance camera at a Surrey townhouse complex with arms filled with other people's mail.

A woman brings a bag to help carry the mail away.

"Somehow they were able to get Canada Post keys," one victim told CTV News.

"Don't know how that happened and it certainly shouldn't have happened."

Residents have posted the video to social media trying to spark tips identifying the thieves to police.

The RCMP is investigating and says it already has suspects.

Canada Post says it's also investigating.

– with files from CTV Vancouver