The Main Intelligence Directorate of the Defense Ministry notes active movement of sniper groups of militants in eastern Ukraine.

"As of today, active movement of enemy's sniper groups has been noted, the number of which has significantly increased recently. Since mid-May, the most intense sniper fire has been conducted in the Donetsk and Mariupol sectors," a representative of Main Intelligence Directorate of the Defense Ministry, Vadym Skybytsky, said at a briefing on Friday.

According to military intelligence, sniper units of about 30 military men were formed in every part of the 1st and 2nd Russian army corps, he said.

"Sniper training is carried out by Russian instructors at training centres of Ilovaysk and Luhansk on the territory of Ukraine, as well as at the military training area of Kadamovskiy and Kuzminskiy in [Russia's] Rostov region," Skybytsky said.

He also stressed that Ukraine knows the names of instructors who conducted the training.

Skybytsky noted that Russia continued to violate the Minsk agreements and supply heavy equipment and weapons to eastern Ukraine.

"During the last week, intelligence agencies of Ukraine revealed 28 violations of the Minsk agreements, concerning retraction of military equipment and heavy weapons. Moreover, the greatest threat is the return of multiple-launch rocket systems to the contact line. In particular, 28 Grad multiple missile launchers were spotted in the populated areas of Amvrosiyivka, Donetsk, Makiyivka, Krasny Luch and Yasynuvata," Skybytsky said.

He stressed that, heavy weapons supplies were still being sent from the Russian Federation in violation of the Minsk agreements. "On May 26, ten tanks and self-propelled artillery vehicles were observed entering Donetsk," Skybytsky said.

He said the information was transferred to a special OSCE monitoring mission.