The male employee, about 50 years old, of Tokyo Power Technology Ltd., a TEPCO subsidiary, was found collapsed and in a state of cardiopulmonary arrest while engaged in decommissioning work at the nuclear facility on Thursday, TEPCO said on Friday.

The man was taken to hospital, but was later confirmed dead, Xinhua news agency quoted TEPCO as saying.

According to TEPCO, the man had been working in the plant's "yellow zone" since about 11 p.m. local time the same day, during backfilling work in an area where protective clothing is required, which is being monitored for water quality surveys. Was dug for. The plant's No. 2 reactor.

TEPCO said the man had no physical abnormalities and was not exposed to radiation before the work.

It said it would "refrain from answering questions regarding the cause of death due to the wishes of the family," but also said it was "less likely" that the death was caused by work.