WARSAW, April 19 — Two people have been detained in Poland on suspicion of attacking Leonid Volkov, an exiled top aide to the late Russian opposition leader Alexei Navalny, Lithuanian President Gitanas Nauseda told reporters today.

Volkov suffered injuries from hammer blows in the attack on March 12 outside his home in Vilnius, the Lithuanian capital.

Lithuanian counter-intelligence said at the time that the attack was the work of Russian special services, and the Kremlin declined to comment.

Nauseda said the suspects would be transferred to Lithuania.

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“I thank Poland for a really good job. I discussed this with Polish President Andrzej Duda,” he said.

“I also want to thank our criminal intelligence (operation), which undertook the initial, the most important ground-work.”

Volkov himself blamed Russian President Vladimir Putin for the attack. Before the assault he had told Reuters that leaders of Navalny’s movement in exile feared for their lives.

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Navalny, Putin’s most prominent critic, died in February in an Arctic prison. Russian authorities say he died of natural causes. His followers believe he was killed by the authorities, which the Kremlin denies. — Reuters