Labour unionists have called on lawmakers to speed up scrutinising a bill that toughens penalties for employers who neglect occupational safety, following a spate of recent fatal industrial accidents.

The call was made by representatives from several labour unions, who petitioned outside the Central Government Offices on Monday morning.

Ip Wai-ming, vice-chairperson of the Hong Kong Federation of Trade Unions' Occupational Safety and Health Association, said the recent accidents highlight the need for greater labour protection.

"Last week, four occupational safety accidents happened and [killed] five workers. It is unacceptable. It [shows] that Hong Kong is not doing enough on occupational safety and health," he said.

At the moment, violations of occupational safety and health legislation carry a maximum fine of HK$500,000. The maximum jail sentence is one year.

The government has proposed raising the maximum penalties of such offences to a fine of HK$10 million and two years’ imprisonment.

Ip said the stiffer penalties are urgently needed, and he hopes the bill can be passed as soon as possible.

"It [current penalty] is not enough… we want the amendment to give stronger deterrent to the employers, especially those who ignore occupational safety," he said.