China calls for tough security laws to end Hong Kong turmoil

China has said the lack of tough security laws in Hong Kong is a key reason for months of increasingly violent pro-democracy demonstrations and that the enactment of such legislation is an "urgent task".

The call -- likely to further inflame protesters angry with a police response seen as heavy-handed -- came in a lengthy statement issued late Saturday by the head of the Chinese government department that oversees Hong Kong.

The statement by Zhang Xiaoming, director of the Hong Kong and Macau Affairs Office, acknowledged that governance in the semi-autonomous city must be improved, saying factors such as high housing costs and a growing wealth gap had contributed to the unrest.

But Zhang also backed a firmer hand, saying laws outlawing subversion and other challenges to Chinese central government control were needed, and stressed that the territory's leader and legislature must be "patriots" loyal to Beijing.

Efforts by Hong Kong's Beijing-controlled government to introduce tough security laws in 2003 caused major protests before being shelved.

The lack of such legislation "is one of the main reasons for the intensification of activities of local radical separatist forces", Zhang said.

"The need to safeguard national security and strengthen law enforcement have become prominent issues and urgent tasks facing the government of the Hong Kong Special Administrative Region and people from all walks of life."