The Nuclear Power Corporation of India Limited has launched a probe by an expert committee to probe how a drinking water cooler in the high-security Kaiga plant in Karnataka's Uttara Kannada district was contaminated with tritium that led to some 50 people falling ill.<br/><br/>Kaiga Nuclear Plant Station Director J P Gupta said that the incident has also been reported to the Intelligence department. He said some 50 employees were subjected to treatment on last Wednesday to quickly reduce tritium dosage in their bodies, after they drank water from the cooler kept in 'Operation Island', a highly restricted zone. The water cooler was isolated. He said the employees became normal within hours of the treatment. <br/><br/>Meanwhile, Atomic Energy Commission Chief Anil Kakodkar today said somebody deliberately put radioactive tritium in a water cooler at the Kaiga Nuclear Power Plant. He said people involved will be punished under the Atomic Energy and other acts after investigation.