Police will take action to ensure the planned Occupy Central protest does not hinder public order.

This was the message from Secretary for Security TK Lai to lawmakers today, saying the Government is very concerned about the proposed event, as people and companies are worried it will impact the community.

Mr Lai said that, according to reports, more than 10,000 people may be called upon to occupy trunk roads in Central to express their aspirations.

He said demonstrations must be held in a peaceful and orderly manner, and not hinder the general public.

"If there is any occupancy of trunk roads in Central – paralysis of traffic, blocking up of public thoroughfares – by over 10,000 people, it will cause grave impact on social order and public safety and even affect emergency services, thereby threatening lives and property."

He said Police will adopt appropriate measures to ensure public order and protect public safety.

Any public meetings of more than 50 people, and processions of more than 30, must be notified to the Commissioner of Police at least seven days before the event, and can only be conducted if there are no objections, he added.