Two civilians are reported to have been wounded near the contact line in the so-called 'grey zone' in Donbas, eastern Ukraine, according to the State Border Service of Ukraine.

"Persons who were crossing the contact line informed members of the Ukrainian Border Service that two civilians travelling in a minibus had been injured either in shelling or a booby-trap blast near the village of Olenivka," the service said.

"The circumstances of the incident are being clarified. The Border Service has notified members of international organizations," it added.