Nov. 12 (Bloomberg) -- Fire destroyed an abandoned warehouse at the site of the 2012 Olympic Games in London, creating a thick plume of smoke that was visible across the U.K. capital.

As many as 15 trucks and 75 firefighters battled the blaze on Waterden Road in the eastern district of Stratford, following a call at 12:06 p.m. local time, the London Fire Brigade said in a statement on its Web site. No injuries were reported.

The 500-acre (200-hectare) site is being cleared in preparation for building of venues such as the main Olympic stadium for the 2012 games. The cause is being investigated, and the Metropolitan Police said there was no sign of terrorism.

``Initial indications would suggest that this was an accident rather than arson,'' said David Higgins, chief executive of the Olympic Delivery Authority, in an e-mailed statement. Plans for the property included demolition of the warehouse, and there will be an investigation into the fire, he said.

The uninhabited Olympic site is one of the most polluted in Britain and includes abandoned industrial buildings, waterways and parkland. In July, workers began cleaning 1.4 million tons of soil contaminated with arsenic, diesel fuel and ammonia.

The authority plans to spend 9.3 billion pounds ($19 billion) preparing for the games.

Arturo Ochoa, 39, was working at a conference at the ExCeL center nearby, and when the fire began ``everybody started leaving to see what was happening,'' he said in an interview. ``People went outside and began making phone calls.''

Flights in and out of London City Airport, about 4 miles (6 kilometers) from the scene of the blaze, were operating normally, airport spokeswoman Linda Alexander said.

To contact the reporter on this story: Brian Lysaght in London at blysaght@bloomberg.net.

Last Updated: November 12, 2007 12:04 EST