Update: Six injured, two critically, as 'major incident' blast destroys shop

Latest: "I felt a tremor, what felt like an earthquake shock and I heard a very low boom that sounded like a very very fast release of pressure."

Update 11.35pm: Six people were injured, two of them critically, after a suspected explosion and subsequent fire destroyed a shop.

Police declared a major incident after the blast in a street in Leicester on Sunday night.