A man filmed his mates rubbing themselves against two women waiting at a Tooting bus stop in an apparent sexual assault.
Police released CCTV images of three suspects today.
They said that two men had approached a 49-year-old woman and a 45-year-old woman waiting at the Amen Corner bus stop at 11.30pm on October 10 last year.
A third man filmed the assaults.
When one of the victims tried to help the other, she was spat at.
Passengers on the 355 bus travelling through Mitcham stopped briefly and passengers called the police.
The three men, described as white and in their early 20s, headed towards Sainsbury's.
Anyone with any information to contact PC Neil Webb on 020 3054 6712 or call Crimestoppers anonymously on 0800 555 111.
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