Ukraine said on Saturday its forces were managing to push back against Russian troops in fierce fighting in Severodonetsk despite Russia “throwing all its power” into capturing the strategic eastern city. At least seven civilians were reported killed in the Lugansk region where Severodonetsk is located and in the southern city of Mykolaiv, while a revered wooden church was reported to be on fire because of the fighting. Lugansk regional governor Sergiy Gaiday said in an interview posted online that the invading forces had captured most of Severodonetsk, but that Ukraine’s forces were pushing t…