KIEV, Sept. 8 - Donetsk Mayor Oleksandr Lukyanchenko says the military action has done "massive" damage to the city.

"It's billions [hryvnias]. If we take the industrial sector, residential; buildings, social infrastructure, energy facilities, and railway, it will be a colossal amount of damage. It will take the city's economy a lot of time to return to the pre-war level," the city mayor said in an interview published in the Monday edition of the newspaper Segodnya.