The whole of Ukraine has been placed on alert for fresh Russian strikes, after new missile attacks on schools and hospitals.
It comes after Vladimir Putin's hardliners urged him to 'bomb the country back to the 19th century'.
The Kremlin has denied any involvement in the latest violence, which saw a school and two hospitals hit by missiles in the early hours of Wednesday morning.
The whole of Ukraine is on alert for fresh Russian strikes after Putin's hardliners urged him to 'bomb the country back to the 19th century.'
In a show of strength, the Kremlin has deployed S-400 air defence systems to Crimea and Iskander missiles to its western border.
Russia has also moved nuclear-capable Tu-22M3 bombers to Crimea while its navy blocked Ukraine's access to the Sea of Azov in a further escalation of tensions.