Intelligence reports show that slightly over 1000 Russian military officers are operating deep inside Ukraine alongside Ukrainian rebels.
Russian backed separatists have swept key towns in the East days after Ukraine military seemed to gain ground in Donestk.
Ukrainian President Petro Poroshenko cancelled a trip to Turkey citing a worsening situation in his country.
The military has lost key towns in the East and where it had ground, it is rapidly losing.
Ukraine troops withdrew from Novoazovsk and amassed strategically to reinforce defenses in Mariupol.
Mariupol is the strategic objective of the Russians and the rebels, intelligence sources confirm.
