An Israeli tourist was injured in the stabbing attack in central London.
A spokesperson for the embassy of Israel confirmed one of the victims was an Israeli woman on holiday in the UK visiting friends and family.
The spokesperson said: “She was injured and taken to hospital but was discharged and she is doing ok.”
A woman in her 60s was killed and five people injured in the attack in Russell Square on Wednesday.
A 19-year-old man, who is a Norwegian national of Somali origin, was arrested on suspicion of murder, after a Taser was used to detain him.
Police said mental health was a "significant factor" in the incident.
He was taken to hospital for treatment and is now in police custody in a south London police station.
Mark Rowley, the Metropolitan Police’s assistant commissioner for specialist operations, said the investigation is being led by the force's homicide command unit, with support from the counter-terrorism unit.
A spokesperson for the Community Security Trust said CST had been in close contact with police since very early this morning, regarding the “possible terror stabbing in Russell Square".