Three men are due to appear in court on manslaughter charges after a shop explosion left five people dead.
Arkan Ali, 37, Hawkar Hassan, 32, and Aram Kurd, 33, were arrested after the blast destroyed a Polish supermarket and two-storey flat on February 25.
Mary Ragoobeer, 46, her sons Shane, 18, and Sean, 17, Leah Beth Reek, 18, who was Shane's girlfriend, and Viktorija Ljevleva, 22, were all killed in the incident on Hinckley Road, Leicester.
The trio also face a separate count of arson with intent to endanger life.
Ali, of Drake Close, Oldham, Hassan, of no fixed abode and Kurd, of Hillary Place, Leicester, will appear at Leicester Crown Court for a plea hearing later.