Residents of a Sherman Oaks condominium complex are concerned after two suspected mail thieves were caught on camera using keys to enter a secured building before emptying out multiple mailboxes.

“They went through everyone’s mailbox and got away with quite a few things,” said Mike Mazzo, a resident of the building.

Surveillance video showed a man and a woman smiling as they walk up the stairs to the secured lobby before the man tries to open the door with what appears to be several keys.

Mazzo thinks the suspected robbers broke the skeleton key that unlocks the mailboxes inside the callbox, and alerted security after he found the broken end of the jammed key inside the console.