Four loud explosions were heard over the center of the city of Belgorod in Russia, reports RIA Novosti, quoted by Darik. 

All about the topic:

Russian invasion of Ukraine 8218

It allows for the possibility that the city's anti-aircraft defense system may have worked. 

The explosions were so strong that the windows of the buildings shook. 

At least 11 dead and 15 injured in an armed attack on a training ground in Russia

The agency notes that there are still no official comments on what happened.

The day before, the air defense system was operating in the Graivoron District and the Valuy District. 

Russian invasion of Ukraine

Belgorod