Man's blundering 'attempted robbery' at Dublin post office with 'deli butter knife'

This video shows a man's blundering 'attempted robbery' at a Dublin post office with what appears to be a deli butter knife.

The footage shows the man, who is dressed head to toe in black including a face covering, brandishing a rounded knife as he approaches the counter in Portmarnock Post Office. As he gets closer to the counter, he takes a bag out of his pocket.

The man leans in and appears to say something to the member of staff behind the counter as a woman looks on baffled beside him. But after a brief moment, he turns and heads for the exit.