The Russian Federal Security Service said on Saturday that it had foiled a Ukrainian plot to kill a senior Russian officer and a pro-Russian military blogger with a bomb hidden in a portable speaker.

The Federal Security Service, the primary alternative to the Soviet KGB, said that a Russian citizen communicated with an officer from the Ukrainian Military Intelligence Agency (GUR) through the Telegram application.

He added that, on the instructions of a Ukrainian intelligence officer, the Russian citizen obtained a bomb from a hideout in Moscow.

The Russian security service explained that the bomb, which was equivalent to 1.5 kilograms of TNT and stuffed with metal balls, was hidden in a portable speaker for playing music.