Two Australians have been confirmed injured in a stabbing attack that left a US woman dead in central London.
The Australians, a man and a woman, suffered non-life-threatening injuries in Wednesday night's attack in Russell Square, a Department of Foreign Affairs and Trade (DFAT) spokesperson said in a statement on Thursday.
Armed police were called at 10.33pm local time after a Norwegian man of Somali origin with a knife started to attack people in the square.
Police said there was no evidence the attack was terrorism related and evidence to date pointed to it being triggered by mental health issues.
An American citizen in her 60s was treated at the scene but pronounced dead a short time later.
Another woman and four men were treated in hospital, though three of them were later discharged. Nationals from Britain, Israel and the US were also among those hurt.
The DFAT spokesperson said the injured Australian man had been discharged from hospital and the injured Australian woman was expected to be discharged soon.
Another Australian woman was at the scene of the attack but was not injured.
Consular assistance has been provided to the man and one of the women and DFAT was attempting to contact the other woman involved to also offer assistance.
Police used a Taser while detaining the 19-year-old suspect and he was later formally arrested on suspicion of murder.
