Firstly sorry to hear of your loss. I hope you did not lose too much in this theft.

Have you reported this to the police and bus company so they can get an image of him from the CCTV?

My sister had her purse nicked in a similar, up close and personal manner a few years back.
I hope you are not too affected by this. Lets hope the next back he sticks his hand in has broken glass or needles in it!