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
A war hero from Birmingham, who was captured as a prisoner of war, will fulfil a lifelong dream when he takes to the skies to fly a plane.
The Ending Female Genital Mutilation Together Conference will look at how to protect vulnerable young women and children at risk.
Derby County have unveiled a memorial at the iPro Stadium to their former player and manager Dave Mackay, who died in March.