The British monarch greeted the summiteers and accompanying partners, including US first lady Melania Trump.
The CDC declined to comment, CNN said.
The Bureau of Alcohol, Tobacco, Firearms and Explosives and the Federal Bureau of Investigation tweeted that agents from their departments were responding to the scene.
The Bay Area, he argues, remains the best bet for young Hong Kong people in unleashing and realizing their innovation potential.
The Beijing Municipal Administration for Industry and Commerce handled 2,300 cases concerning IPR infringement and counterfeit products, up 92 percent from 2016. The city's cultural authorities handled 2,700 cases, up 55 percent.
The Belt and Road Initiative aims to build a trade and infrastructure network connecting Asia with Europe and Africa along and beyond the ancient Silk Road trade routes, with industrial cooperation as a crucial part.
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The BRICS countries - Brazil, Russia, India, China and South Africa - signed an agreement in July 2014 to set up the NDB. The bank went into full operation in February 2016. The initial capital comes at billion, with each member country holding a 20 percent share in the bank.
The Beijing Customs District under the General Administration of Customs of China will introduce customs surety insurance from Sept 1, as part of its ongoing efforts to lower costs for small and medium-sized enterprises and improve efficiency.
The BREP will adhere to the principles of cooperation and shared benefit, promote mutually beneficial energy cooperation, help countries and regions jointly solve problems facing energy development, achieve shared development and prosperity and make positive contributions to the building of a community with a shared future for humanity, he said.
The British government has keenly supported the initiative. The government agency UK Export Finance said it would support British companies' work on Belt and Road projects with 25 billion pounds ( billion) of finance.