Air Defense Forces are operating in Sumy, the RMA reported on Sunday, UNN reports .
The explosions heard by residents of the regional center are the work of our air defense units. Take care of yourselves and your families, do not ignore air raid alarms
Earlier, the Air Force of the Armed Forces of Ukraine warned about the threat of using air strikes in the frontline areas.
Enemy forces conducted an air strike on the energy infrastructure of Romny district at night. Ukrainian troops destroy 3 enemy drones in Sumy region .