TALLINN, Estonia: A Russian university professor working at a prestigious Estonian university was jailed this week after he was found guilty of spying for Russian military intelligence.

Estonian officials blame Moscow for the professor's role in a campaign of sabotage, electronic warfare and information gathering.

Viacheslav Morozov, who taught at Estonia's country's most prestigious university, was sent to prison for six years and three months for undermining the Baltic state's security during the 14 years he worked in the country until his arrest in January.

Estonian officials take all threats from Russia very seriously and have convicted many people of spying for Russia in recent years. Harju County Court in Tallinn said Morozov collected information about Estonia's defense and security policy and the people and infrastructure related to it.

Russia and Estonia have had an icy relationship since 1991, when Estonia regained its independence from the former Soviet Union. The Baltic state is one of the most vocal supporters of Ukraine.

Morozov was recruited in Russia in the early 1990s when he studied at St. Petersburg State University.

While Morozov cooperated with the GRU, Russia's military intelligence arm, he was never a staff officer and did not actively start working for them until 2010, when he moved to Estonia.

In 2024, 13 people have been arrested in Estonia over attacks allegedly organized by Russian military intelligence operating under diplomatic cover. Flights between Finland and the city of Tartu were disrupted by the Russians jamming GPS signals.