National prosecution authorities will investigate and severely punish duty-related instances related to food-safety crimes, the Supreme People's Procuratorate (SPP) said on Friday.

Food-safety crimes occur frequently and are mainly blamed on weak supervision by relevant authorities as well as dereliction of duty of some law enforcement officials, Zhang Bencai, spokesman for the procuratorate, said at a news conference on Friday.

"We will actively investigate job-related crimes, including supervision malfeasance and accepting bribes involving food-safety crimes and severely punish them according to the law," he said.