Emergency services have declared a major incident following an explosion which destroyed a terraced property.
Nottinghamshire Police says officers were called to John Street in Worksop just before 20:00 BST on Saturday.
Multiple properties on the street have been evacuated, and fire crews, police officers and ambulances are at the scene.
There is no confirmation of injuries, police said.
Fire crews from Warsop, Worksop and Mansfield Fire Station as well as Clowne Fire Station are also in attendance.
Ch Insp Neil Humphris said: "This is a major incident and emergency services will remain at the scene throughout the night.
"Multiple properties have been evacuated as we work with our partners to respond to this incident and understand how it happened."
Karolina Ciolko, who lives near the scene, told the BBC: "I was lying in bed when I heard an explosion.
"I quickly looked out the window. I saw smoke and the car in front of me rocked and the alarm went off. We quickly ran out of the house to see what had happened."
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