A Georgian train carrying oil products hit a mine Sunday and at least two tanker cars were burning. Georgian television showed big clouds of black smoke billowing from the site near the central city of Gori. There were no immediate reports of casualties, but Georgian television said two nearby houses were damaged and windows were blown out. Georgian Interior Ministry spokesman Shota Utiashvili blamed Russia for the blast. He says the train may have been carrying petroleum products from Azerbaijan toward a Georgian Black Sea port. A television report said 10 of the tanker cars were burning. Russia has pulled most its troops out of Georgia after days of warfare but maintains significant positions in the ex-Soviet republic.