- Officers believe they know who the victim is and are looking for her relatives
- A 28-year-old man has been arrested on suspicion of murder
- Police say anyone with information should call the incident room on 020 8345 1570
More top news
Six people were injured after they were hit with the substance during an "altercation" between two groups at a shopping in east London.
Save Your Uber in London was set up after it was announced the firm would not have its licence renewed when it expires next week.
Survivors are still traumatised, homeless and want answers.