A major fire broke out late on Saturday at London's famous Camden market, consuming part of the Hawley Arms pub, a favoured haunt for celebrities, fire officials and witnesses said.
There were no immediate reports of casualties.
A London fire department spokeswoman said more than 100 firefighters and 20 vehicles were at the scene battling the blaze, which occurred off of Chalk Farm Road, near one of the British capital's most popular open-air markets.
A fire department spokesman said there were no immediate reports of any casualties.
An Associated Press Television News reporter at the scene reported the smell of gas and said the fire appeared to be spreading across the markets, consuming part of the Hawley Arms, a famous Camden pub where celebrities, including singer Amy Winehouse, hang out.
Video images showed bright orange flames, some up to 30 feet (9 meters) high, throwing huge plumes of smoke into the night sky.
The culturally vibrant Camden area has six open-air and indoor markets, which are popular with tourists and residents.
The area is known for its alternative bars, clubs, shops and stalls and all are typically very busy on weekends.
A London Ambulance Service spokesman said a hazardous response team was on site.
Some reports suggested there may be gas canisters within the area affected by the fire.
Police said it was too early to comment on the possible cause of the blaze.