Washington (CNN) Amid ongoing unrest in Hong Kong, Chinese officials have rejected a US request to have two US Navy ships make port visits there in the coming weeks.

"The Chinese Government denied requests for port visits to Hong Kong by the USS Green Bay and USS Lake Erie, which were scheduled to arrive in the next few weeks," Cmdr. Nate Christensen, the deputy spokesman for the US Navy's Pacific Fleet, told CNN in a statement on Tuesday.

The amphibious transport dock ship USS Green Bay was scheduled to visit Hong Kong on August 17 and the guided missile-cruiser USS Lake Erie was scheduled to visit next month.

Not the first time

"The US Navy has a long track record of successful port visits to Hong Kong and we expect them to continue. We refer you to the Chinese Government for further information about why they denied the request," Christensen said.

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