A schoolboy who took revenge for being dumped by killing his ex-girlfriend and her older sister in a house fire is facing a life sentence.
The 15-year-old, who cannot be named because of his age, was found guilty at the Old Bailey of murdering Maleha Masud, 15, and Nabiha Masud, 21.
Jurors heard that a day before the attack in June last year the boy had searched on Google for "how to burn someone's house down".
The boy was also found guilty of the attempted murders of the sisters' mother Rubina Masud, 55, and brothers Zain, 24, and Junaid, 18.
Rasal Khan, 19, of Earl Howe Street, Leicester, who was accused of helping him, was found not guilty of the attempted murder charges. The jury is still considering verdicts in the two murder charges.
It is also considering verdicts in murder and attempted murder charges on Shihabouddin Choudhury, 21, of Coventry Road, Nottingham.
The judge gave the jury a majority direction.
The sisters died after the blaze at their family home in Tooting, south London, last June.
Other family members were rescued.
