Stab wound
A 29-year-old is arrested on suspicion of attempted murder. The incident is not being treated as terror-related by police.
A 21-year-old woman died from a stab wound and a 38-year-old man later died at Green Park Underground station earlier this month.
The victim, aged in her 40s, had sustained a stab wound to her back after being attacked by a man.
Natasha Welsh has been charged with the murder of Martin Welsh.