During the investigation of Mariupol shooting in 2015, SSU detected Russian militants relation to the case. They say that the crime was conducted by two full-time missile divisions of the Russian Armed Forces. The head of SSU informed that the collected information will be transmitted to the International Court of the UN.

On 24 January 2015 Russian occupants  shot residential neighborhoods of Mariupol from BM-21 – thirty people died and a hundred were injured.