Including January's figures, NY had still experienced more murders so far this year than London.
No arrests have been made over the shooting, which comes amid concerns over rising violent crime in the capital.
Overall totals so far this year still has NY as the deadlier city with 50 murders, compared to 46 in London.
For the first time in history, the murder rate in the British capital has overtaken that of the Big Apple, marking a deterioration of the security environment in London.
City Hall said it is "deeply concerned" but insists London "remains one of the safest [cities] in the world".
Six people were attacked by a 19 year old man with a knife at 10.30pm in Russell Square, London last night. The cities have a similar-sized population.
London has strict gun laws, leading to many crimes there being committed by criminals with knives and other weapons.
For 2018 so far, there have been 46 murders in London - 31 as a result of knife attacks.
Croydon Central MP Sarah Jones, who chairs the all-party parliamentary group on knife crime, told the BBC's Today programme that the United Kingdom should follow New York's example in tackling violent crime.
In an effort to reverse the unsafe trend, Metropolitan Police Commissioner Cressida Dick announced that the capital's police force will increase "intelligence-led" stop-and-search.
Britain's interior ministry said it was consulting on new laws to further restrict unsafe weapons, including banning online stores from delivering knives to residential addresses and making it an offence to possess certain weapons in public. The national government has been run by the Conservatives since 2010, with Prime Minister Theresa May previously serving as interior minister from 2010 to 2016.
Interestingly, Met Police commissioner Cressida Dick believes that social media is to blame.