Passers-by nab alleged Perth bank robber

A 63-year-old alleged armed robber has been charged over two separate thefts on the same street in central Perth one week apart.

Police say the man demanded money from a teller at a bank on Murray Street on Friday morning after indicating he had a weapon.

The teller refused and was pushed by the man, who grabbed cash and ran from the bank but was held by two passers-by until police arrived and took him into custody.

The man also allegedly stole a cash tin from a business on Friday last week after struggling with a female employee.

He has been charged with armed robbery and robbery, been denied bail and will appear in the Perth Magistrates Court on Saturday.