NSDC Secretary Oleksandr Turchynov said this during his visit to Marinka and Krasnohorivka on Wednesday, the press service of the National Security and Defence Council reported. "In May, as a result of military provocations, seven Ukrainian soldiers were killed and 141 servicemen were wounded. One of the latest trends is the use of 152mm self-propelled artillery and multiple rocket launcher systems to shell the positions of the Armed Forces of Ukraine at a distance of up to 20 km from the line of demarcation," he said.