Russian troops delivered one massive and two combined strikes by precision weapons and unmanned aerial vehicles on Ukrainian military-industrial enterprises, energy and transport infrastructure over the period of May 12-15 in response to Kiev’s attacks on civilian facilities
TASS is Russia’s state-owned news agency, so there’s no expectation of neutrality or journalistic best practices.
It can still be informative, as long as the stories are taken as the best plausible narrative they can construct to account for whatever it is that actually happened.