The incidents in Romford and Wembley in the last week have left their local communities shocked.
There is no indication that the incidents are linked, and these are only the incidents that Newsquest London is aware of.
Last weekend, Zahwa Salah Mukhtar was found fatally wounded in an attack in Chadwell Heath Lane around 5.30am on August 16. (Image: PA)
The “dearly loved” 27-year-old had been out with friends in Hackney earlier that day, but was pronounced dead hours later.
FULL STORY: 'Loving’ woman 'murdered' in Chadwell Heath named and pictured for first time
A 35-year-old man has been arrested on suspicion of murder, and a 21-year-old and 22-year-old were arrested on suspicion of assisting an offender.
A 35-year-old man was arrested the next day on suspicion of assisting an o