Four more arrests have been made in connection with the death of a mum and three children after their home was purposely set on fire, police have said.

Bryonie Gawith, also known as B, and her three children – Denisty, nine, Oscar, five, and 22-month-old Aubree Birtle – died in the early hours of Wednesday last week after a fire broke out in Westbury Road, Bradford.

West Yorkshire Police said a 25-year-old man has been arrested on suspicion of murder and attempted murder following police inquiries in the Keighley area in the early hours of Monday morning.

Two other people, a 54-year-old woman and a 42-year-old man, were also arrested from the same address on suspicion of assisting an offender.

A 44-year-old man was then arrested on suspicion of murder and attempted murder shortly after 10am after he attended a police station.

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Scenes are in place in Kensington Street and Alice Street in Keighley as inquiries continue.

A 36-year-old man, who was arrested on suspicion of murder and attempt murder on Friday, remains in custody.

A 45-year-old man, who was also arrested on Friday, has been released with no further action.

A 39-year-old man, who was arrested on Wednesday, remains in hospital, where his condition is believed to be critical.

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In a statement issued through the police force, the victims’ family said the loss of “our B” and the children, referred to as “Chuch, Oggy and Strawberry”, had brought “unimaginable sadness and grief”.

“We are still trying to comprehend what has happened to our beautiful family,” the statement said. “No words can describe how we are feeling and no words could ever make up for the profound loss we are now faced with.”

The children’s father, Jonathan, said he was “absolutely distraught” after the “sudden loss”.

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