Ukraine war latest: Over 20,000 Russian troops trying to storm Chasiv Yar; Budanov says Ukraine to face 'difficult situation' from mid-May
Key developments on April 22: * Military: Over 20,000 Russian troops trying to storm Chasiv Yar, outskirts * Budanov: Ukraine faces 'difficult situation' starting mid-May * Russia claims to have captured Novomykhailivka, Ukraine denies * Russia destroys Kharkiv TV tower * Poland cannot transfer Patriots to Ukraine but will provide other help, Tusk says