Yale 3 star lock stuck

[MorphDoc]

Hi

I have Yale 3 star lock (anti snap one) which is stuck.

1. My door is currently open
2. I have removed the screw the holds the lock
3. My key is stuck in the cylinder. I can move it between 12 and 3 oclock, bot not beyond this
4. I cannot remove the cylinder for the door lock


I think I am unable to move align the barrel with the cylinder and therefore I am unable to remove if.

What can I do? Can I snap the lock from the inside, since the anti-snap mechanism exist on the outside bit?

I need help!