More than 700 officials have been investigated for breach of duty related to workplace accidents in the first half of the year, the Supreme People's Procuratorate (SPP) said on July 29.

In the first half, prosecutors started investigating 467 graft cases related to workplace accidents, according to an SPP statement.

Prosecutors have finished investigating 457 officials implicated in the cases and filed charges against 443 of them, it said.

The SPP itself led investigations into three significant cases and supervised another 17 cases.

The top procuratorate asked local prosecuting agencies to step up efforts against cases of graft that could be related to workplace accidents.