An Estonian defence ministry official has been jailed for passing NATO secrets to Russia. Herman Simm handed over more than 2,000 pages of information to his handlers at Moscow’s foreign intelligence service.The court convicted Simm of treason and passing over state secrets, and jailed him for 12 and a half years. The Baltic states were swallowed up by the Soviet Union during World War II, and Estonia still has many citizens of Russian origin and sympathies. Diplomatic ties with Moscow remain tense. Estonia joined NATO in 2004, and the case is deeply embarrassing for a country seen as a staunch ally of the West. NATO has made no official comment but is said to be alarmed. The Kremlin denies any involvement.