A security guard has described the moment he stepped in to disarm a knifeman following a stabbing in London's Leicester Square

A man has been arrested after an attack that's left an 11-year-old girl needing hospital treatment and a 34-year-old woman with minor injuries.

Police aren't treating the incident as terror-related, and say the girl's injuries aren't life threatening.

Security guard Abdullah has told Sky News, he heard a scream, then jumped on the man.

He says he held the man down, took the knife off him and waited for the police to arrive.