The five died when a blast ripped through a Polish convenience store and a home last Sunday, turning the building into rubble.
Police said in a statement they had charged three men over the case: Aram Kurd, 33, from Leicester, Hawkar Hassan, 32, from Coventry and Arkan Ali, 37, from Oldham.
The three will remain in custody and appear in court on Monday. Two other men have been arrested and are still being questioned, the police said.
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