Pro-democracy protesters in Hong Kong engaged in new clashes with police Wednesday at a suburban subway station, the site of a mob attack on demonstrators last month.
Thousands took to the city's Yuen Long station, spraying fire extinguishers at police and barricading themselves inside.
Others spread oil over the station floor to stop police from advancing.
Outside, squads of riot police marched on protesters that had blocked entrances to the subway and closed off roads to the station.
The protesters are angry that no one has been prosecuted for violent assaults on demonstrators at the station last month as they returned from marching through central Hong Kong.
Demonstrators want to ensure that Hong Kong retains its autonomous status from mainland China, believing those freedoms are being eroded.
President Trump has sent mixed messages on Hong Kong, on Wednesday expressing renewed support for the pro-democracy protesters.
(SOUNDBITE) (English) U.S. PRESIDENT DONALD TRUMP SAYING: "I hope it works out in a humane way, and I think President Xi has the ability to make sure that happens." Trump has tried to tie the protests to talks to end a raging trade war with China, but has also said the matter is an internal Chinese affair.