Illegal armed groups have opened fire on the positions of the Joint Forces Operation (JFO) 50 times over the past 24 hours, wounding three Ukrainian servicemen, the JFO's press center has reported.

"The situation has remained complicated in the JFO area over the past 24 hours, on May 11. Active hostilities continued in all directions. Russian occupation forces violated the Minsk agreements 50 times over the past day, including 19 times with the use of heavy weapons," reads a report as of 07:00 on Saturday, which was posted on the Facebook page of the JFO's press center.

The situation remained tense in the Donetsk sector, where fighting continues round-the-clock near Verkhniotoretske, Kamianka, Avdiyivka, Opytne, and Pisky. Militants used 120mm mortar to fire at the village of Zaitseve.

In the Luhansk sector, near the villages of Krymske, Troitske and Novozvanivka, militants were more active with the onset of darkness.

"JFO units also defended actively near Hnutove and Shyrokyne in the Mariupol sector," the report says.

According to Ukrainian intelligence, three militants were killed and four wounded.

Three Ukrainian soldiers were wounded during the fighting.