Hong Kong protesters shot bows and hurled petrol bombs from a barricaded university campus on Sunday.
The Hong Kong Polytechnic University campus was one of five universities that protesters used to block the city's central cross-harbour road tunnel.
According to reports, a policeman and a media officer were wounded in the incident.
Clashes also broke out on the artery of Nathan Road of Mong Kok, a frequent venue for unrest.
Meanwhile, China's People's Liberation Army (PLA) soldiers were seen monitoring developments from a base close to the university.
It comes after a government spokesman clarified that the military had initiated the operation as a "voluntary community activity" and not at the request of the government.
Earlier, the soldiers were seen helping residents clear debris that blocked key roads.
A US military-built pier off Gaza's coast is being temporarily removed after a part of the structure broke off, the Pentagon said, in the latest blow to efforts to deliver humanitarian aid to Palestinians.
South Korea has accused North Korea of sending a large number of balloons across the heavily fortified border between the countries to drop objects that included trash and excrement, calling the act base and dangerous.
The Biden administration said on Tuesday it was closely monitoring the probe into a deadly Israeli airstrike it called "tragic", but that the recent deaths in Rafah didn't constitute a major ground operation there that crosses any US red lines.
Israel pounded Rafah with airstrikes and tank fire on Tuesday, pressing its offensive in Gaza's southern city despite international condemnation of an attack that sparked a blaze in a tent camp for the displaced, killing at least 45 people.