Several regions of Russia are facing fuel shortages again after Ukraine resumed almost daily attacks on oil refineries in the country.

The Orenburg region in Russia’s Urals introduced a rationing system starting Wednesday that allows sales based on vehicle license plates, limits gasoline and diesel sales per driver at the pump and bans the filling of fuel canisters.

That followed Ukraine’s drone strike Tuesday on the Orsk refinery in the region that’s some 1,500 kilometers southeast of Moscow, which officials said could take as long as six months to repair.