Melb commuters terrorised by men: police

Police have released CCTV footage of two men who assaulted and threatened to kill two commuters on board a night bus in Melbourne's CBD last month.

Investigators believe that although the duo got on the Frankston-bound bus in Swanston St separately early on May 24, they may know each other.

They've also urged a young blonde woman who was seen chatting to one of the men on the bus to contact them.