Pavel Lerner, a blockchain expert, was taken hostage by masked gunmen on December 26Kiev: Kidnappers in Ukraine have released an employee at a United Kingdom-registered cryptocurrency exchange after getting more than $1 million (Dh3.67 million) in bitcoins as ransom, an adviser to the Ukrainian interior minister told Reuters on Friday. Pavel Lerner, a leading analyst and blockchain expert, was abducted by unknown masked people on December 26, according to a statement by his company, EXMO Finance, on its website. “This is the first such case in Ukraine linked to bitcoins,” Anton Gerashchenko, an adviser to Interior Minister Arsen Avakov, said...