Ukrainian landmine warning
A billboard indicates the presence of landmines at the position of a Ukrainian volunteer unit in a suburb of Kyiv on February 28, 2023.
  • Ukraine's counteroffensive to drive back Russia is encountering serious challenges. 
  • A Ukrainian official said Russia had laid 5 mines per square meter in some regions. 
  • Ukrainian troops are having to clear minefields by hand, according to reports. 

Ukrainian forces are encountering heavily-defended Russian positions and fields with up to five mines per square meter as they move forward with their counteroffensive, according to a Ukrainian official.