"The Ministry of Foreign Affairs of Latvia strongly condemns the judgement rendered by the Pskov regional court of the Russian Federation in the case of Eston Kohver, an Estonian Internal Security Service Office," a statement by the ministry said.
"According to information at the Foreign Ministry’s disposal, the officer was abducted from the territory of Estonia, which constitutes a breach of international law. A number of violations have also been found in the trial process itself. Thus the judgement is to be regarded as illegal and should be revoked."
On 5 September 2014, Russian security services abducted Eston Kohver at Luhamaa, in the south-east of Estonia, near the Estonian-Russian border; Kohver was forcefully taken to Russia, where he faced charges of spying.
Russia claims Kohver was captured on its soil in possession of a gun and cash.
The claims have been roundly condemned by the European Union and United States.
You can read details of Kohver and his case here.