Assistant Chief Constable Garry Shewan said: "Officers will be reviewing CCTV and speaking to witnesses in order to investigate this attack thoroughly, as we do with all crimes. It is unfortunate that this incident happened but the fact we were able to identify this as a hate crime is very positive. Just last Thursday we announced that we will now record alternative subculture as a hate motivation.
"We hope this encourages victims to continue to come forward so we can take positive action against offenders."
The new hate crime category comes after pressure from the Sophie Lancaster Foundation.