World Bulletin / News Desk
The state emergency services said the blast took place at midnight at a Defense Ministry warehouse near the town of Kalynivka in the western Vinnytsia region, 270 kilometers (168 miles) west of the capital Kiev.
One person was also injured and hospitalized during the fire, it added.
The reason for the blast was unknown, but Ukrainian General Staff officials told reporters that they could not exclude the possibility of sabotage.
Fire and rescue teams were dispatched to the area.