British Transport Police said the incident happened at around 11.15pm on Friday, March 29, as the women were travelling home from Blackpool onboard a train between Blackpool North and Preston.
Officers said the women were approached by a group of men, who were abusive and violent after finding out the women were lesbians.
If you can help the investigation in any way, call British Transport Police on 0800 40 50 40 or Crimestoppers, anonymously, on 0800 555 111. In all calls quote log B8/NWA of 7/5/13.
Read more : www.lep.co.uk