Demolition works have begun on the former Accrington Conservative Club after it was ravaged by fire.
The suspected arson at the Grade II listed five-storey building on Cannon Street was tackled by more than 50 firefighters from crews across east Lancashire on Tuesday.
The area was fenced off later that day as part of an exclusion zone and road closures were put in place on Cannon Street and Paradise Street.
The fire service continued working on dampening down the fire throughout Wednesday and partial demolition works began on Thursday morning.
Officers on large demolition cranes have begun by removing large loose stones on the top of the building and chimney stacks on the side.
John Taylor, of Lancashire Fire and Rescue Service, said parts of the building are in danger of ‘immediate collapse’.
Four people living in two neighbouring homes on Eagle Street have also been evacuated and move to alternative accommodation by the council.
Police are appealing for witnesses to call 101 quoting incident reference 110 of May 18.