Spokesman for the Presidential Administration on army operation Oleksandr Motuzianyk said at a briefing in Kyiv that the accident occurred in a mine-sweeping operation. Motuzyanik also reported that Russian occupation forces had refrained from shelling the Ukrainian military in Donbas over the past days. The second stage of arms withdrawal from the contact line started on Tuesday. Army operation press centre said it involves withdrawal of tanks, artillery with calibre of less than 100mm and mortars with calibre under 120 mm. The weapons will be moved at least 15 kilometres away from the contact line.