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Worker at Japan's wrecked nuclear plant dies after accidentally falling into water tank

  • This photo taken Monday, Jan. 19, 2015 and provided by Tokyo Electric Power Co. (TEPCO) shows a water storage tank, center, which a worker fell into, at Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima Prefecture, northeastern Japan. A worker at Japan's wrecked nuclear power plant died early Tuesday after falling into the water storage tank, the latest in a growing number of accidents at the site still struggling to clean up the mess from the 2011 Fukushima disaster. (AP Photo/Tokyo Electric Power Co. )

    This photo taken Monday, Jan. 19, 2015 and provided by Tokyo Electric Power Co. (TEPCO) shows a water storage tank, center, which a worker fell into, at Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima Prefecture, northeastern Japan. A worker at Japan's wrecked nuclear power plant died early Tuesday after falling into the water storage tank, the latest in a growing number of accidents at the site still struggling to clean up the mess from the 2011 Fukushima disaster. (AP Photo/Tokyo Electric Power Co. )  (The Associated Press)

  • This photo taken Monday, Jan. 19, 2015 and provided by Tokyo Electric Power Co. (TEPCO) shows an opening atop a water storage tank which a worker fell into,  at Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima Prefecture, northeastern Japan. A worker at Japan's wrecked nuclear power plant died early Tuesday  after falling into the water storage tank, the latest in a growing number of accidents at the site still struggling to clean up the mess from the 2011 Fukushima disaster. (AP Photo/Tokyo Electric Power Co. )

    This photo taken Monday, Jan. 19, 2015 and provided by Tokyo Electric Power Co. (TEPCO) shows an opening atop a water storage tank which a worker fell into, at Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima Prefecture, northeastern Japan. A worker at Japan's wrecked nuclear power plant died early Tuesday after falling into the water storage tank, the latest in a growing number of accidents at the site still struggling to clean up the mess from the 2011 Fukushima disaster. (AP Photo/Tokyo Electric Power Co. )  (The Associated Press)

A worker at Japan's wrecked nuclear power plant died after falling into a water storage tank, the latest in a growing number of accidents at the site still struggling to clean up the mess from the 2011 Fukushima disaster.

The operator of the Fukushima Dai-ichi plant said the worker, 55, died of multiple injuries early Tuesday after falling through an opening atop a 10-meter (33-foot) high tank. He was one of three men inspecting the tank. Tokyo Electric Power Co., which operates the plant, says the cause of the accident is under investigation.

Currently, the plant's decades-long decommissioning involves nearly 7,000 workers. The number of injuries in April-November totaled 40 last year, compared to 12 a year earlier, underscoring growing concern about sloppy safety measures.