HONG KONG, Nov. 20 (Xinhua) -- Wearing a blue T-shirt emblazoned with the words "I love the police," Ms. Chan, in her 20s, on Wednesday joined hundreds of Hong Kong residents to clear roadblocks and debris near the Hong Kong Polytechnic University (PolyU).

Rioters have occupied the PolyU campus for days, blocking roads and setting fires to properties in the surrounding area.

"The violence has seriously affected my work and my life. It takes at least twice as long for me to get to work these days," Chan said.

Chan said she wore the special T-shirt to express her support for the hard work of the police, adding that sanitation workers are not enough to clean up all the Hong Kong streets damaged by rioters.

"As Hong Kong residents, we also want to contribute our own strength."

A 70-year-old sanitation worker was recently killed after being hit in the head by a brick hurled by rioters. "Those who love Hong Kong and clean up roadblocks are assaulted," Chan said, "This is ridiculous."

"I am here today to tell you that not all young people in Hong Kong act like that," she said, referring to the rioters' acts of violence and vandalism.

Next to the university, the Cross-Harbor Tunnel at Hung Hom, a major artery linking the Hong Kong Island and Kowloon, has also been forced to close for days with debris scattered on all the vehicle lanes.

"We all hope that the Cross-Harbor Tunnel will resume operation as soon as possible," Ms. Lau said.

"Whatever your position, it is wrong to destroy Hong Kong," she said, urging the mobs to stop sabotage in their beautiful home.

At the scene, Stanley Ng, president of the Hong Kong Federation of Trade Unions, called on all Hong Kong residents to work together to clean up Hong Kong, unite to stop violence and chaos, and fight against "black violence."

Ms. Wong, who lives in Tseung Kwan O, brought tools such as buckets and shovels to join in the clean-up, removing bricks, stones and barricades set up by the rioters.

Wong said they were doing the right thing by voluntarily clearing the barricades.

"Although we are unarmed, we are not afraid," she said. "We just hope that the traffic in Hong Kong can be restored as soon as possible and our life can return to normal."