A backlog of more than 530 serious workplace accidents from the past two years has prompted the China government's work safety committee to pressure regional authorities to step up their investigations, according to China Daily.

The State Administration of Work Safety (SAWS) Wednesday released a circular, which revealed that 3,245 serious workplace accidents, each involving 10 or more deaths, had occurred over the two-year period. The document followed an order by the SAWS last month that said all provincial and municipal officials must act on findings of investigations on major workplace accidents before January 15.

The latest circular said 10,657 individuals responsible for accidents had been investigated or punished.

The safety committee said 2,707 cases had been closed.

Those responsible for the accidents received either criminal penalties, Party disciplinary punishment, or administrative penalties.

Bans have also been imposed on 152,985 of 178,473 known illegal construction, production and business units.

There were more than 500,000 recorded work accidents in China last year, resulting in 98,340 deaths.

The death rate was down almost 20 percent from the year before, according to the administration.

The number of accidents was down almost 13 percent.

The administration said 3,770 people were killed in mining disasters across the country last year.