Employees were evacuated from three Moscow buildings of the Investigative Committee early Friday after bomb threats were received.
The investigative body received messages regarding bombs at its central office on Tekhnichesky Pereulok, its Central Federal District division office on Shcherbakovskaya Ulitsa, and its forensics division office on Baumanskaya Ulitsa, Investigative Committee spokesman Vladimir Markin told Interfax.
Explosives specialists from the Federal Security Service were dispatched to check the buildings, Markin said. They found no bombs and employees began returning to the buildings shortly after noon, Markin told RIA-Novosti.
A law enforcement source told Interfax that the threats caused particular worry because of investigators' interrogations this week of opposition leaders.
Anti-corruption blogger Alexei Navalny, Left Front leader Sergei Udaltsov, Solidarity leader Ilya Yashin and opposition figure Kseniya Sobchak have all been called in for questioning by the Investigative Committee this week in connection with violence between protesters and police at an opposition rally May 6 at Bolotnaya Ploshchad.
Yashin and Sobchak were set to be questioned Friday.