BROWNSVILLE, Minn. (AP) — The Canadian Pacific Railroad says around 850 gallons of soybean oil leaked when six tanker cars derailed into the Mississippi River in southeastern Minnesota.

CP spokesman Andy Cummins says three of the six cars were successfully unloaded Thursday and are expected to be safely removed from the river Friday. The other three will be emptied Friday.

Fifteen cars on the Canadian Pacific train derailed Tuesday night south of Brownsville. The six cars that landed in the river all carried soybean oil, and two of them leaked. Cummins says the railroad doesn't think the three remaining cars in the water are leaking.

Booms have been placed downstream to catch any oil in the water.