Joanna Chiu

Associated Press

HONG KONG (AP) — Riot police in Hong Kong on Saturday moved in to arrest the remaining 50 students who occupied the premises of government headquarters during a night of scuffles to protest China's refusal to allow genuine democratic reforms in the semiautonomous region.

About 100 others continued to shout slogans outside the square where the government complex is located, and chanted at police to stop arresting their colleagues.

The dispersal followed a night of scuffles between police and protesters who forced their way into government headquarters, some scaling a tall fence. Police on Friday night responded with pepper spray to push them back. At least 29 people have been injured, police said.

Hong Kong's Secretary for Security Lai Tung-kwok said he regretted the chaotic events in an otherwise "peaceful" society and urged students to leave the square and other protesters not to join them.

The scuffles erupted at the end of the weeklong strike by students demanding China's Communist leaders organize democratic elections in 2017.

Tension over Hong Kong's political future has risen significantly since control of the former British colony passed to China in 1997.

China's leaders have promised universal suffrage for the semiautonomous region, but last month ruled out letting the public nominate candidates, instead insisting they be screened by a committee of Beijing loyalists.

Hong Kong's young people have become vocal supporters of full democracy in recent years, fueled by anger over widening inequality.

Thousands of university and college students who had spent the week boycotting classes were joined Friday by a smaller group of high school students.

Organizers said those arrested at government headquarters included Joshua Wong, a 17-year-old leader of the activist group Scholarism, who was dragged away by four officers. Wong, a recent high school graduate, gained prominence two years ago after he organized protests that forced the Hong Kong government to back off plans to introduce a Chinese national education curriculum that some feared was a form of brainwashing.

"Our movement is peaceful and does not use aggression," said University of Hong Kong students' union president Yvonne Leung. "Students who decided to storm inside (the government complex) knew about their legal responsibility."

The student protest was organized independently of Occupy Central, an alliance of pro-democracy activists that plan to blockade Hong Kong's financial district to call for genuine democratic reforms.

On Saturday, several Occupy Central members joined students protesting outside the square.

Benny Tai, a key leader of the movement, told reporters the group would "stay with the students until the end and risk getting arrested ourselves". Tai also criticized the amount of force police used on students.

Occupy Central has hinted that their blockade would begin Wednesday, China's National Day holiday, and Tai said the protest would go ahead as scheduled.