Kyiv — Russia's President Vladimir Putin acknowledged on Sunday that Ukrainian strikes were causing "problems" for Russia.
Ukraine has intensified strikes on Russia recently, targeting energy and logistics infrastructure.
Ukraine's Defense Minister Mikhailo Fedorov said he aims to turn Crimea into "an island," isolating it from the rest of Russia.
On Friday, Russian authorities in Crimea announced a state of emergency after halting all fuel sales to civilians in response to Ukrainian attacks earlier in the week.
Amid the attacks from Ukraine, Putin said addressing fuel shortages across Russia and shoring up the country's air defenses against Ukrainian attacks were top priorities.
In his interview, Putin said he had dismissed a Ukrainian proposal for a mutual ceasefire on long-range strikes.
"It is clear why this proposal is being made, because our counter-strikes deep into Ukrainian territory are much stronger, have greater impact and are, frankly, more destructive," Putin said. »