Thousands of Hong Kong protesters on Sunday sang "The Star-Spangled Banner" and called on U.S. President Donald Trump to "liberate" the Chinese-ruled city, the latest in a series of demonstrations that have gripped the territory for months.

Police stood by as protesters, under a sea of umbrellas against the sub-tropical sun, waved the Stars and Stripes and placards appealing for democracy after another night of violence in the 14th week of unrest.

"Fight for freedom, stand with Hong Kong," they shouted before handing over petitions at the U.S. Consulate. "Resist Beijing, liberate Hong Kong."