A fire at a disused warehouse on the site of the 2012 Olympic Park in east London has been brought under control.
More than 75 firefighters tackled the blaze as 50ft (15m) flames engulfed the building in Waterden Road, Hackney Wick at about 1200 GMT on Monday.
Black smoke could be seen across the skyline and the Fire Brigade received more than 150 calls from the public.
Rail services were suspended between Dalston Kingsland and Stratford but roads in the area remained open.
The warehouse is on the western edge of the proposed site of the Olympic Village and was due to be demolished on Monday.
Assistant Commissioner Dave Brown, of the London Fire Brigade, said investigations were ongoing but the fire was not thought to be suspicious.
He also confirmed that asbestos had been found on the site.
Professor Virginia Murray, of the Health Protection Agency, sought to reassure people over the substance.
She said that research showed it was usually long-term exposure to asbestos which causes a significant health risk.
"Our advice is not to touch any of the material that may have come from the fire and make sure that they (members of the public) get in touch with their local authority so that an appropriate clean-up can be undertaken," she said.
The Olympic Delivery Authority (ODA) Chief Executive David Higgins said it would carry out a full investigation into the fire.
He said: "Initial indications would suggest that this was an accident rather than arson.
"We are in touch with local residents and are keeping them informed of the situation."
He said that work was continuing in the rest of the park.
The blaze was close to the Channel Tunnel high speed rail link but Eurostar said the fire did not have an impact on services.
Flights from nearby London City Airport were also unaffected by the fire.
A Transport for London spokesman said services on the overground line from Richmond were terminating at Dalston Kingsland.
Fire crews were expected to remain at the site overnight to ensure the fire is damped down properly.