"As a result of these days, of the whole week, we have secured stronger positions in Kharkiv Oblast. The 57th Brigade, the 82nd Air Assault Brigade, thank you, warriors!" Zelensky said.Zelensky also said that Ukraine successfully repels Russian assaults in Donetsk Oblast, including the area near the city of Chasiv Yar, which became one of the main strategic targets.Russian troops have not been achieving their aim of spreading Ukrainian forces along the entire front line in Kharkiv and Donetsk oblasts, the president added.Russia's offensive in Kharkiv Oblast in mid-May could be the first of several waves, and Russian forces may target the regional capital, Kharkiv, Zelensky said in an interview with AFP on May 17.Russian troops managed to advance as far as 10 kilometers (6 miles) as a result.Ukraine's military intelligence chief, Kyrylo Budanov, suggested earlier that Russian forces may launch a similar offensive in Sumy Oblast when the conditions are more favorable.48 hours in Kharkiv, Ukraine’s most-bombed major cityThe first signs that something ominous is happening in Kharkiv come as soon as the train from Kyiv reaches the suburbs of the city – as two pillars of smoke appear in the distance, every single phone in the carriage erupts with a piercing electronic squawking.