Russian aircraft bombing runs in Ukraine have increased by 50%, a spokesperson for Ukraine's Defense Ministry said on Monday, reported Reuters. 

The recent escalation of the fighting in Ukraine comes after Ukrainian President Volodymyr Zelenskyy said over the weekend that talks with Russia are at a "dead-end", given that Ukraine will not trade away its territory or people.

Moreover, if Russian forces follow through on threats to destroy the remaining Ukrainian troops in Mariupol, this would "put an end" to peace talks, Zelenskyy warned.