Ukrainian President Volodymyr Zelensky confirmed Tuesday, saying they were used on the battlefield against Russia and ‘executed very accurately.’

Ukrainian officials have said their troops are holding out against fierce Russian efforts to wrest control of Avdiivka, a heavily fortified city.

Outnumbered and outgunned, Ukrainian teams numbering four to a dozen can attack on foot far less conspicuously than with vehicles, surprising complacent enemies and triggering chaos along the front.