A woman has been arrested in connection with an explosion in which five people died.
A Polish supermarket and the flat above it were destroyed in the blast in Hinckley Road, Leicester, on 25 February.
The 32-year-old, from Leicester, was arrested on suspicion of conspiracy to commit arson on Friday and she was later released under investigation.
Three men have been charged with murder and arson over the deaths.
Aram Kurd, 33, of Hillary Place, Leicester, Hawkar Hassan, 32, of no fixed address and Arkan Ali, 37, of Drake Close, Oldham, who are also charged with manslaughter, are next due in court in October for a pre-trial hearing.
The five people who died were 22-year-old shop worker Viktorija Ijevleva, Mary Ragoobar, 46, and her sons Shane Ragoobeer, 18, and Sean Ragoobeer, 17, and Shane's girlfriend Leah Beth Reek, 18.