Police had been referred to as at about 5.30pm on Sunday to studies of a person and two kids injured at a home in Aldborough Road North, Ilford.
A one-year-old lady was pronounced useless on the scene, whereas the boy died in hospital the place he was being handled for his accidents, police stated.
A 40-year-old man has additionally been taken to hospital for remedy.
Police stated all three suffered knife accidents and that they’re all identified to one another.
A homicide investigation has been launched though police should not on the lookout for anybody else in reference to the incident.
The London Ambulance Service and London’s Air Ambulance additionally attended the incident.
Jas Athwal, the chief of Redbridge Council, tweeted: “Earlier right this moment there was an incident in Ilford. Two younger kids have handed away & an investigation is ongoing. My ideas are with the household and wider group who’re grieving this unspeakable tragedy.
“I’m in contact with the police who’re doing all they’ll to convey the investigation to a decision. We ask that everybody please respects the household’s privateness at this tough time
Enquiries into the circumstances proceed.