MOSCOW, October 20 (RIA Novosti) - An explosive device with a force of around 100 grams of TNT equivalent went off Friday morning outside a tax service building in central Moscow, the Emergency Situations Ministry said.
"An explosive device was probably planted in one of the external air conditioning systems," a ministry spokesman said.
No injuries have so far been reported.
A group of investigators and bomb-disposal experts has arrived at the building, located on Dolgorukovskaya street near Novoslobodskaya metro station.
