McDonald's and Tricon Global Restaurants have temporarily closed some of their mainland outlets following the US-led Nato bombing of the Chinese Embassy in Belgrade. McDonald's suspended operations of some of its 229 restaurants after anti-US protests swept across major mainland cities. Tricon, which operates the Pizza Hut, Taco Bell and Kentucky Fried Chicken chains, closed 20 of its 300 outlets. Officials of the two fast-food chains said their operations were affected, but the situation was under control. Some McDonald's and KFC outlets suffered exterior damage. Most of the two companies' restaurants were being reopened as the wave of protests gradually subsided. A Shanghai-based McDonald's official said customer volume of the affected outlets had fallen, but there was no major damage. Tricon said it closed outlets during the weekend as a precautionary measure. Three of their four outlets in Hunan province were seriously damaged and could not re-open for business. A Tricon spokesman, Jonathan Blum, said the company would continue to 'keep a watchful eye on the environment'. He said Tricon's mainland general managers had been advised to step up security measures. 'We're obviously concerned about the situation and have been monitoring it on an hourly basis since we learned of demonstrations there,' Mr Blum said.