Russian-led forces have mounted 12 attacks on Ukrainian troops in Donbas in the last 24 hours, with no casualties reported, the press centre of the Joint Forces Operation (JFO) has reported.

"Russian invaders, without using weapons prohibited by the Minsk agreements, opened fire on the positions of our troops 12 times ... There are no casualties among the JFO troops," the JFO staff said on Facebook on Tuesday morning.

Russian occupation forces opened aimed fire from grenade launchers of various systems, heavy machine guns and small arms to attack our defenders. "In almost half of the cases, our troops responded with adequate fire," the staff said.

The attacks were observed in the vicinity of Shchastia, Krymske, Zolote, Pisky, Maryinka, Taramchuk, Berezove, Novotroyitske, Chermalyk, and Lebedynske, it said.

A fortified position of our troops near Shchastia came under fire from automatic and mounted grenade launchers. The attack lasted for almost three hours. However, the enemy most often attacked our soldiers near Maryinka and Lebedynske.

According to Ukrainian intelligence, three militants were killed and two wounded during the day.

"There have yet been no attacks on Ukrainian positions since the beginning of the day," the press center said.