A 26-year-old man has been arrested over a violent incident on a bus that left a young woman unconscious.

The victim, 22, was at the back of the bus, which was travelling through south-east London, when a group of five men got on board and sat down nearby.

Members of the group, who were all unknown to the woman, started criticising her clothing and some appeared to move to be closer to her.

The incident escalated and she fell to the floor of the bus and was unconscious.

She was taken to hospital with a head injury after the incident, which happened on a 344 bus in Lambeth at 1.15am on August 29, and was released later that day.

The man was arrested on suspicion of grievous bodily harm after attending a police station in south London earlier today.