London police investigated more murders than their NY counterparts did over the last two months, statistics show, as the British capital's mayor vowed to fight a "violent scourge" on the streets.
The shootings come amid concerns over rising violent crime in the capital.
Throughout London eight murder investigations were launched in January, 15 in February and 22 in March.
A 17-year-old girl has been shot dead in north London.
The shocking tally means the murder rate in London has risen by 40% in just three years; the stark opposite to New York's crime statistics which have fallen by almost 90% since Mayor Rudolph Giuliani's harsh crackdown in the 1990s.
Mayor Sadiq Khan's office said it was "deeply concerned" by the latest figures, but insisted that London "remains one of the safest [cities] in the world". The cities have a similar-sized population.
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A rise in knife crime has seen London overtake New York's murder rate. Of the 47 murders in London so far this year, 31 have been committed with knives.
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.
A Downing Street spokesman said that the Government's new serious violence strategy will focus on intervention measures meant to "break the cycle" of violent crime.
In contrast, London's Metropolitan Police Service (MPS) has been gradually scaling back its pre-emptive measures, specifically stop-and-search ops, due to accusations of political incorrectness, as the operations allegedly discriminated against ethnic minorities, who were targeted by police officers more frequently.
Jones added: "Knife crime and violent crime acts like an epidemic, so you need to go in at the source to cut it off and then you need to inoculate the future young people against it".
Other friends told how they tried to comfort Tanisha in her last moments, staying by her side after the fatal shooting.