The Hong Kong government has issued a strong condemnation of the so-called Occupy protesters.

The condemnation follows a violent outburst yesterday morning, which saw protesters clash with police as they attempted to surround Hong Kong's main government buildings.

Lai Tung-kwok is the head of Hong Kong's Security Bureau.

"Their actions are not allowed by any government, and not what the public want to see as well. I strongly condemn the student group and its leaders for last night's occupying actions."

Hong Kong Chief-executive CY Leung is warning demonstrators not to return to the protest site.

"From this day on, the police will take resolute action when carrying out their duties. I call on the students who are thinking of returning to the occupation area tonight not to do so. Do not think that the police's tolerance in the past means they are incapable of handling the situation. Don't mistake the police tolerance as weakness. The police and the government are responsible for maintaining social order as soon as possible."

The violent protests yesterday morning left 11 police officers injured.

Around 40 demonstrators were arrested.

There have been increasing calls in Hong Kong for the protesters to stop blocking the roads amid growing concerns over the impact on people's daily lives and the local economy.