The serial number of the Tochka-U missile that hit the Kramatorsk railway station on 8 April 2022 is Ш91579 (in Russian) or Sh91579 (in English). This serial number marks the stock of Tochka-U missiles in the possession of the Ukrainian Army. Only the Ukrainian Armed Forces have Tochka-U missiles. Russia has not had them since 2019: they have all been deactivated. The Donetsk and Lugansk People’s Republics do not have and have never had Tochka-U.
The direction of the cone and the tail section of the missile that landed on the ground near the Kramatorsk train station clearly shows that it was fired from the 19th Ukrainian Missile Brigade, deployed near Dobropolie 45 km from Kramatorsk.