Investigators hope to access part of London's Camden Market today which has been ravaged by fire.
Around 100 firefighters and 20 fire engines battled the major blaze on Saturday night.
The cause of the fire could remain unknown for days because structural engineers still need to assess the safety of some of the buildings.
The fire wrecked the market, shops and celebrity hangout The Hawley Arms pub - a favourite of troubled singer Amy Winehouse and supermodel Kate Moss.
The fire raged for three hours, before it could be brought it under control.
LFB station manager Guy Foster said preliminary investigations were under way. He confirmed the first stage would be for investigators to interview eyewitnesses, before they were able to safely search the buildings.
Last night the owners of the Canal Market complex, Camden Market Holdings, said more than 300 people faced an uncertain future because of the blaze. But they added they are committed to rebuilding the devastated market.
Police closed much of Camden High Street, Chalk Farm Road and other roads surrounding the blaze moving crowds of revellers from the area's pubs and bars of fears there may be gas canisters within the area affected.
The areas are expected to remain closed to traffic and pedestrians over the next few days.