Four more people have been arrested by police investigating a house fire that killed a mother and three children in Bradford. Bryonie Gawith, 29, was found dead at the scene in Westbury Road on Wednesday, and her three children, Denisty Birtle, nine, Oscar Birtle, five, and Aubree Birtle, 22 months, died later in hospital. West Yorkshire police said the home was “deliberately set alight” in the early hours. A 25-year-old man was arrested on suspicion of murder and attempted murder in the Keighley area of the city in the early hours of Monday morning, West Yorkshire police said. A 54-year-old woman and a 42-year-old man were also arrested at the same address on suspicion of assisting an offender, while a 44-year-old man was arrested on suspicion of murder and attempted murder shortly after 10am on Monday after he attended at a police station. The force also said a 36-year-old man detained on Friday remains in custody and a 39-year-old man, who was arrested at the scene on Wednesday on suspicion of murder, remains in hospital in a critical condition. A 45-year-old man also arrested on Friday has been released with no further action and eliminated from the investigation. Police cordons have been set up in the area as officers continue their inquiries. In a previously released statement, Bryonie, known as B, was described as the “life and soul of the party”. “Music was a big part of her life, she loved music, singing and dancing,” the statement said. “ B was always a really happy, joyful, bubbly beautiful woman, who cared for everyone and was loved by everyone, her kids were everything to her, her whole life. ” The children’s father, Jonathan, also released a statement and said: “I am absolutely distraught at the sudden loss of my fiancée, Bryonie and our three beautiful children. Bryonie and I were together for a long time, and we had a good life together.” Anyone with any information should call 101 or contact West Yorkshire Police on its live chat facility here, quoting log 107 of August 21. Information can also be given anonymously via the independent Crimestoppers charity on 0800 555 111.