Three youngsters have been released on police bail after being arrested following a blaze at a disused factory which has claimed at least two lives.
Examination of the scene is likely to last for several days
Emergency services were called to the building used by homeless people in Hanley, Stoke-on-Trent, on Wednesday.
The release of two boys aged 11 and 13 and a 17-year-old youth takes the total on bail in connection with the investigation to 10.
The two bodies recovered from the scene have still to be identified.
The BBC understands they are a man in his early 30s and a woman in her mid 20s.
More bodies may be inside. The scene at the Hamilton Reid building is still being examined and this is likely to last for several days, police said on Saturday.
The three youngsters were released on police bail pending further inquiries.
The others arrested and subsequently released on bail were six men and a woman aged between 19 and 44.