Former Russian oil tycoon Mikhail Khodorkovsky travels to Switzerland on 3-month visa

FILE - In this Dec. 22, 2013 file photo Mikhail Khodorkovsky speaks during a news conference in Berlin, Germany. Switzerland has granted Khodorkovsky a visa, the Swiss Embassy in Berlin said Monday, Dec. 30, 2013. He applied for a three-month visa shortly after his Dec. 20 arrival in Berlin, following his pardon by Russian President Vladimir Putin and release from decade-long imprisonment. (AP Photo/Michael Sohn, File) (The Associated Press)

Former Russian oil tycoon Mikhail Khodorkovsky has traveled to Switzerland after receiving a three-month visa for the Alpine country.

His spokesman Christian Hanne says Khodorkovsky and his wife went to Switzerland by train Sunday from Germany to accompany their two sons, who were returning to their Swiss school.

Khodorkovsky was pardoned Dec. 20 after spending more than a decade in Russian prisons after receiving a conviction the West considered political revenge for his challenging Russian President Vladimir Putin. He then flew immediately to Berlin.

Days later, Khodorkovsky applied for a visa to Switzerland, a country he long had business ties to.