TRENTON (AP) - It might take until the end of the month to finish cleaning up from a Jan. 12 derailment on the edge of this northwestern North Dakota town, BNSF Railway says.

Spokesman Gus Melonas said the railroad is still investigating the cause of the wreck and tallying damages.

Twenty-three cars left the tracks, spilling lumber, paper and french fries. Crews are cutting up destroyed rail cars into smaller pieces to be shipped away.

No one was hurt in the derailment but the track had to be closed for a time, and Amtrak passengers had to be bused. Amtrak uses the same line as BNSF.