Perth customers have been left in the lurch after their local post office closed unexpectedly at the weekend, leaving their parcels and mail locked inside the deserted building.

The North Perth post office on the corner of View Street and Fitzgerald Street shut up shop at 5pm on Friday.

The North Perth outlet. Credit:Google Maps

But some customers say they were not told of the closure, and are now unable to pick up their mail still inside the store.

An Australia Post spokesman blamed the post office's closure on “unforeseen circumstances”, and said Australia Post was working to get access to the building.