DCI John Sandlin, who is leading this investigation in Edmonton, said:
This is was a highly visible attack in broad daylight on a residential street.
I can understand why this may cause people concern, however we are confident that we are not looking for anyone else at this stage.
Whilst it is too early to speculate on what the motive behind this attack was I am confident, based on the information currently available to me, that it is not terrorist related.
Local officers and specialist detectives are at the scene and will remain there for many hours to come.
Specially trained family liaison officers will be deployed to support the family; we request that their privacy is respected at this very difficult time.
More top news
Prime Minister insists the UK will maintain a strong relationship with Europe especially on trade and security, even after it leaves the EU.
Cloudy, with outbreaks of rain spreading northeast across the UK, however northern Scotland remaining largely dry until later.
The five-year-old was bitten on the face and had to undergo surgery to her eyelid after the dog attacked her at an event in West Yorkshire.