A woman was knocked unconscious after having a glass bottle smashed over her head in a shocking broad daylight attack on-board a Central Line Tube.
Detectives on Friday appealed for information over the assault which happened at around 3.30pm on December 2 between Shepherds Bush and Liverpool Street.
The attack began when another woman sat next to the victim when an argument broke out, the British Transport Police said.
She began to punch the victim in the head repeatedly, scratching her face and pulling her hair.
Three members of the public restrained her - but she returned to the victim and started to stamp on her feet.
She then poured a bottle of juice over the victim before taking an empty glass bottle and smashing it over the head of the victim, causing her to lose consciousness.
The British Transport Police appealed for any witnesses, including those who restrained the attacker, to make contact, saying they may be able to help the investigation.
Anyone with information can contact British Transport Police by texting 61016 or calling 0800 40 50 40, quoting reference 41 of 26 December.
Alternatively, you can contact Crimestoppers anonymously by calling 0800 555 111.
