Russia Arrests Suspects In Plot To Assassinate Military Leaders After Killing of Top Nuclear Officer

The scene in Moscow where Lt. Gen. Igor Kirillov, the head of Russia's nuclear forces, was killed Dec. 17 in a blast outside his apartment. The Federal Security Service said Thursday that it made arrests in a plot to kill high-ranking Russian military officials. (Credit: ALEXANDER NEMENOV/AFP via Getty Images)

Russia claimed Thursday it had thwarted plots to kill top-ranking military officers by Ukrainian intelligence services and have made several arrests - an announcement that comes a week after a Russian general was killed in a bombing in Moscow, according to reports.

The Federal Security Service, known by the acronym FSB and the successor to the Soviet-era KGB, said it had arrested four Russian citizens in the scheme to assassinate Russian officers and their families by using bombs, Reuters reported.