TOKYO (AP) — A United Nations rights investigator said Monday that Japan hasn’t done enough to protect the health of residents and workers affected by the Fukushima nuclear accident.

Anand Grover, U.N. special rapporteur on the right to health, said the government has adopted overly optimistic views of radiation risks and has conducted only limited health checks after the partial meltdowns at several reactors at the Fukushima Dai-ichi nuclear power plant caused by an earthquake and tsunami in 2011.