This is written by the Financial Times.
"If we manage to achieve our strategic goals on the battlefield and when we find ourselves on the administrative border with Crimea, we are ready to open a (diplomatic) page to discuss this issue," RIA Novosti quoted him as saying.
It is noted that Sibiga spoke about the long-planned counteroffensive of the Ukrainian army.
The Kremlin noted that crimea is an integral part of Russia and claims to Russian territory will receive a proper response.
Russian President Vladimir Putin has repeatedly stressed that the issue of Crimea is closed for Russia, and the referendum on the peninsula was held in strict accordance with international law.
Crimea became a Russian region after a referendum held there in March 2014: the majority of residents voted for reunification with Russia.