A woman was attacked in the town centre on Friday night (January 10).
The 47-year-old victim was walking with a man in Wellington Place when she was assaulted by a young woman and suffered minor head and chest injuries.
A passer-by and the driver of a silver metallic 4x4 stopped to help the victim after the attack, which happened at around 11.15pm.
PC Daniel Moss, of Hastings response investigation team, said: “We would like to speak to the person from the silver 4x4 and the other person who helped the victim to see what they can tell us about what happened.
“Did you or a friend of yours witness this incident? If so please contact us.”
The attacker, who was with a group of youths, was in her teens and of Afro-Caribbean descent. She was 5ft 8ins, of slim, athletic build and had her dark afro-type hair tied back.
She was wearing a shiny blue hooded waist length jacket, blue jeans and boots.
A 16-year-old woman from Hastings was arrested on suspicion of common assault. She was questioned before being released on bail until March 9.
Anyone with information should call 101 quoting serial 1611 of 10/1, email firstname.lastname@example.org or call the independent charity Crimestoppers anonymously on 0800 555111.