The remarks were Putin’s first on the offensive launched May 10, which opened a new front and displaced thousands of Ukrainians within days. Earlier Friday, a massive Ukrainian drone attack on the Russia-occupied Crimean Peninsula cut off power in the city of Sevastopol, after an earlier attack damaged aircraft and fuel storage at an airbase.
In southern Russia, Russian authorities said a refinery was also set ablaze.
Moscow launched attacks in the Kharkiv region in response to Ukrainian shelling of Russia’s Belgorod region, Putin told reporters while visiting the Chinese city of Harbin.
“I have said publicly that if it continues, we will be forced to create a security zone, a sanitary zone,” he said. “That’s what we are doing.” Russian troops were “advancing daily according to plan,” he said and added there were no plans for now to take the city of Kharkiv.