Vasily Aleksanyan's lawyer Gevorg Davgyan said his client on April 8 was punished for refusing to undergo a medical examination.
A Moscow court on April 7 ordered Aleksanyan's arrest on charges of laundering money and embezzling over 12 billion rubles ($433 million) from two other Russian oil groups, Tomskneft and the Eastern Oil Company (VNK).
Aleksanyan was appointed Yukos's vice president only on April 1.
(Interfax)