Lysychansk (Ukraine) (AFP) – Russia said it would establish a humanitarian corridor to evacuate civilians from a chemical plant in Severodonetsk starting Wednesday as Ukrainian forces wage a desperate battle for control of the city. The industrial hub is under intense bombardment as Russia focuses its offensive on the eastern Donbas region in an effort to seize a swathe of Ukraine. Moscow’s forces have intensified efforts to cut off Ukrainian troops remaining in the city, destroying all three bridges which connect it across a river to the twin city of Lysychansk. NATO chief Jens Stoltenberg me…