A worker wearing a protective suit points at a cracked concrete pit near its No 2 reactor of the Tokyo Electric Power Co (TEPCO)'s Fukushima Daiichi Nuclear Power Plant in Fukushima prefecture, April 2, 2011. Operator of Japan's crippled Fukushima Daiichi nuclear complex said on April 6, 2011, that it had stopped leaks of contaminated water with high levels of radiation into the ocean. [Photo/Agencies]

TOKYO - The outflow of highly radioactive water into the Pacific Ocean from the crippled Fukushima Daiichi nuclear power plant has stopped after the injection of a chemical agent, Tokyo Electric Power Co (TEPCO) said Wednesday.

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TEPCO, the nuclear plant operator, injected sodium silicate, also known as "water glass," and another agent near a seaside pit where the highly radioactive water had been seeping through to stem the leakage.

The nuclear plant has been severely damaged by the March 11 mega earthquake and ensuing tsunami.