A woman was sprayed with suspected pepper spray, subjected to racial abuse and assaulted during family day out in central London.
British Transport Police said the victim, 34, had been entering Bond Street Underground Station with her sister and two young children, one of whom was in a pushchair.
A well-dressed couple were walking together in front of them when the female collided with the buggy.
A spokesman added: “The man then began shouting racial abuse at the victim and her family, before the woman grabbed her hair.
“When the victim tried to defend herself the man pulled out a small bottle and said it was pepper spray before spraying it in the direction of the victim and her family.
“The woman shouted abuse and made lewd gestures at them before both parties left the area.”
Detectives released an image of two people they want to speak to following an incident at around 7.30pm on Saturday, October 11.
Officers believe the man and woman could have information that may assist their enquiries.
Enquiries to establish what the substance was are ongoing. There were no ill effects reported.
Anyone who recognises them is asked to text BTP on 61016, quoting reference 413 of 12 October, or Crimestoppers anonymously on 0800 555 111.
