Two Polish citizens detained over hammer attack on Navalny ally

Arrests over Leonid Volkov attack come as Moscow appears to step up clandestine operations in Europe

Two people have been detained in Poland on suspicion of attacking Leonid Volkov, a top ally of the late Russian opposition activist Alexei Navalny, the president of Lithuania has announced.

Volkov was briefly hospitalised last month after he was ambushed and attacked outside his house in Vilnius, the capital of Lithuania. The assailant smashed open Volkov’s car window and repeatedly struck him with a hammer, breaking his left arm and damaging his left leg before fleeing the scene.