As a result of the shelling of the town of Kramatorsk in Donetsk region on Tuesday four Ukrainian servicemen were killed, Ukrainian president commissioner for Donbas settlement and member of the Ukrainian delegation to PACE MP Iryna Heraschenko has said.

"Four soldiers were killed and many were wounded," she said at a meeting of the Verkhovna Rada on Tuesday.

She went on to say that seven civilians were killed and more than 20, including four children, were injured in the shelling. Nine of the injured are in critical condition.

Heraschenko added that, according to information available to her, a drone was flying over Kramatorsk before the shelling.

Meanwhile, Donetsk Regional State Administration reported, quoting the health department's data, that as of 16.00 the number of those injured in the attack had risen to 58.

"Seven civilians were killed as Kramatorsk was shelled from Horlivka with Grad multiple rocket launchers (which used the rockets of Tornado multiple launch rocket systems) today. Twenty-six other civilians, including five children, sustained injuries of varying degrees," it said.

In addition, 32 military servicemen were injured at the local airfield, according to the report.

"The overall number of those injured in the attack amounts to 58 people, including both civilians and military servicemen," the administration said.

Spokesman for the General Staff of the Ukrainian Armed Forces Vladyslav Selezniov told Interfax-Ukraine that militants had shelled the airport and residential houses in Kramatorsk with Smerch multiple rocket launchers.

"The thing is that militants fired not only at military targets - the airfield, they purposefully shelled the town. They used Smerch and not Tornado multiple rocket launchers. The debris sticking out of the ground in the town can be clearly seen, their caliber is much larger than that of Grad rockets. These are Smerch systems. Their range is sufficient for the rockets to come from the territory of Horlivka, and they [the multiple rocket launchers] are very powerful. Therefore, there are many casualties among the civilian residents of Kramatorsk," he told the agency on Tuesday.