A sixth person has been arrested in connection with the suspected murder of three children who died after a house fire in Salford.
Demi Pearson, 14, was pronounced dead at the scene, in Walkden, while her eight-year-old brother Brandon and seven-year-old sister Lacie later died in hospital.
The children's 35-year-old mother, Michelle Pearson, is in a serious condition in hospital while a fourth sibling, three-year-old Lia, is critically ill.
Greater Manchester Police said of five people who were arrested on Monday, two men, aged 19 and 20, who were arrested on suspicion of murder and a 24-year-old man who was arrested on suspicion of assisting an offender have been bailed pending further enquiries.
A man and woman also arrested on Monday remain in police custody.
Emergency services were called to the mid-terraced house in Jackson Street just before 5am on Monday.
Two 16-year-old boys who were also in the house freed themselves before fire crews arrived and put out the blaze.
Police confirmed there had been "earlier incidents" at the address and said the force had made a self-referral to the Independent Police Complaints Commission.
A crowdfunding page has been set up for the family.
Anyone with any information should contact police on 0161 856 8797, or call 101 or the independent charity Crimestoppers, anonymously, on 0800 555111.