A seven-year-old girl and three women were shot dead in London on Saturday.
They were taken to hospital by helicopter and ambulance, Scotland Yard said.
The injuries to the women, aged 41 to 54, are not life-threatening, but in one case life-changing.
The police were initially unable to provide any information on the condition of the girl.
The incident is said to have happened near a church near Euston train station, where a funeral service is said to have taken place at the time.
According to initial findings, the shots were fired from a moving car, which then drove away, the police statement said.
There were initially no arrests.
Police called on potential witnesses to come forward.
In a message on Twitter, the police also said that the police presence had been "significantly increased".
As the English newspaper "The Guardian" reports, the event was a memorial service for a mother and daughter who died 25 days apart.
The mother died of a blood clot after a flight from Colombia to London and the daughter shortly afterwards - presumably as a result of leukemia.
The leader of the British Labor Party, Keir Starner, expressed his condolences via Twitter.
Starmer wrote that he was "deeply shocked" by the events.
The place where the shots were fired is part of the politician's constituency.