Several residents in the neighborhood said they woke up to intense smoke near Reno Avenue and Loch Lane. One neighbor said her dog woke her to the sight of the fire and she called for help.

"My little dog Anna here woke me up on the bed and I smelled smoke and so I got up and looked all around our house. I opened the garage door and saw the house across the street and the roof was engulfed so I called 911. If she hadn't had woke me up to get on the bed there's no telling how it would have spread or lives lost over it," said Kelly Bryant.

The Oklahoma City fire department said the home was ripped apart by the flames, including a huge portion ofcompany's giant, low rise research and development campus on the edge of Shanghai.

The facility houses 10,000 employees, yet is still not big enough for Huawei's ambitions, and apparently it can't be photographed. Soon after touring the canteen - it can seat 2,000 for lunch - photographers and camera crews were told no pictures were permitted inside its showroom for "security reasons".

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That prompted a little grumbling, but nothing major as a technology evangelist from the company talked us through advances in 5G and how it could be used to drive cars, fly drones and control robots.

Then came the inevitable question about national security - the same question the company has been asked almost every week since the United States banned it from working on government projects in 2011. That's