Spiral Tunnels British Columbia - Two investigators with the Transportation Safety Board (TSB) are headed to Field, B.C., after multiple cars from a westbound train derailed on the CP line near the Upper Spiral Tunnel on Thursday.
 
The TSB reported 27 cars had derailed on Thursday, but CP on Friday clarified that 16 had derailed.
 
A count by TSB investigators ultimately determined 15 cars had left the tracks.
 
The derailment was reported on the CP Laggan subdivision, which runs from Calgary to Field, B.C., just after 10:00 MT.
 
The train was travelling at 22 kph.
 
No injuries were reported.
 
The investigators "should be there very late tonight or early Friday," said TSB spokesman Alex Fournier.
 
The Upper Spiral Tunnels are near Cathedral Mountain, between Lake Louise and Field.
 
CP said the train was carrying a variety of commodities and there were no concerns to public safely.
 
It was the second derailment reported in a national park in two days.
 
CN officials said a gondola-style petroleum coke car came off the track on Wednesday near Jasper.
 
There was no spill or leak reported and no injuries.
 
The car remained upright and the track is being repaired.
 
Clarification
 
An earlier version of this story reported the number of cars derailed was 27.
 
The number was provided by the TSB based on an initial estimate from CP.
 
CP clarified Friday morning the number of cars involved in the derailment was only 16 - 4 Jan 2019 08:24 MT.
 
Dave Dormer.