Two men have been arrested in connection with a house fire on Beverley Drive, Bentilee, on Thursday (16 December).
Officers were called to the address at approximately 10:55pm.
A 31-year-old woman and a 13-year-old girl remain in critical but stable condition in hospital.
Both men, aged 21 and 22, from Stoke-on-Trent, were arrested on suspicion of attempted murder yesterday (Saturday 18 December).
They remain in custody.
Anyone with any information or relevant dashcam footage should message Staffordshire Police on Facebook or Twitter, quoting incident 804 of 16 December, or call 101. Alternatively, contact Crimestoppers anonymously on 0800 555 111.