Damaged lens or sensor - Canon EOS 20D

[T Walker]

Hi there!

I recently dropped my camera (during a snowball fight) and it bounced along the pavement.
Everything seemed ok until I took some shots in the low light with some bright spots from streetlights and I noticed a large amount of 'star burst' (almost like rain) always on the same (right hand) side of the image. See attatched,

Before I go through the long winded process of insurance claims, sending it away to Canon, etc. does anyone know if this is likely to be lens damage or camera (sensor?) damage?

Any help would be really apreicated...

/t