Karwar: Intelligence agencies had warned the Nuclear Power Corporation of India Limited (NPCIL) authorities about possible threats to the security of the Kaiga power plant. Raman Gupta, Superintendent of Police, Uttar Kannada had written on two occasions to the officials in charge of the security of the plant conveying the concerns of intelligence agencies. In letters written on 23-03-09 and 08-07-09 to the Station director of the Kaiga project and other officials of NPCL, Mr. Gupta drew their attention to the intelligence warning that bitter inter-union rivalry posed a danger to the security of the nuclear installation.