An advance unit of North Korean troops may have been deployed to the front lines of Russia's war against Ukraine, South Korean lawmakers said Wednesday after a hearing with officials of the country's Defense Ministry.The ministry said it has no information regarding North Korean casualties on the front lines, according to the lawmakers.Citing information from two Western intelligence officials, CNN reported Tuesday that a small number of North Korean troops have already entered Ukraine."It seems that a good many of them are already in action," an official was quoted as saying.U.S. officials…READ FULL ARTICLE