The 17-year-old male arrested after two girls were stabbed is believed to be their brother.
One of the victims is thought to be aged 16 and police now believe the other victim is 10-years-old.
A woman in her 40's was also stabbed. The condition of the three is said to be 'serious'.
A baby discovered at the house was unharmed.
More top news
Bookies are taking bets on who will be next, after Sam Allardyce stood down from the role after allegations he abused his position.
It follows allegations that pictures - including those of the Duchess of Cambridge and her children - were taken from her online account.
Nottingham City Council posters urging people not to give money to beggars have been banned for being likely to cause widespread offence.