Kiev, Moscow get into ugly spat over Brussels attacks
The head of Ukraine's state security services said Tuesday he could not rule out Moscow's involvement in the deadly Brussels blasts, prompting the Russian prime minister to call him a "moron".
Tuesday attacks on the Belgian capital's international airport and a metro train killed around 35 people and were claimed by the self-proclaimed Islamic State group.
But Ukraine's SBU state security service chief Vasyl Grytsak told reporters a possible Russian role could not be ruled out.
"I do not make unsubstantiated statements and affirm anything," Grytsak said in televised comments.
"But I would not be surprised if these acts of terror in Brussels have a Russian trace."
Russian Prime Minister Dmitry Medvedev issued a swift and blunt response.
"SBU chief Grytsak, who made the announcement about Russia's involvement in the Brussels terrorist attacks, is a moron," Medvedev wrote on Facebook.
Relations between the two ex-Soviet neighbours have been frozen since Russia's March 2014 annexation of Ukraine's Crimea peninsula and the subsequent outbreak of a pro-Moscow eastern separatist revolt.
Russia denies Ukrainian and Western charges of sparking the conflict in reprisal for the February 2014 ouster in Kiev of the country's Kremlin-backed president.
© 2016 AFP