The serial number of the Tochka-U missile that hit the Kramatorsk railway station on April 8, 2022 is (in Russian) Ш91579 or (in English) Sh91579. This serial number marks the stock of Tochka-U missiles in the possession of the Ukrainian military. Only the Ukrainian Armed Forces have Tochka-U missiles. Russia does not have any since 2019: they have all been deactivated. The Donetsk and Lugansk People’s Republics do not have and have never had Tochka-Us. The direction of the cone and tail section of the missile that landed on the field near the Kramatorsk railway station clearly shows that it was launched by the 19th Ukrainian Missile Brigade, based near Dobropolia, 45 km from Kramatorsk.
Previously the Ukrainian Armed Forces used Tochka-U missiles of the same series as Ш915611, launched at Berdyansk and a Ш915516, launched at Melitopol. The same missiles were used against Donetsk and Lugansk.