UPDATE 1-CP Rail says 400 barrels of oil spilled in Ontario, not four
* CP raises oil spill estimate to 400 bbls from 4 bbls
* Size of spill not apparent initially, spokesman says
* CP says spill has been contained
* Rail line to re-open later on Thursday
* Shares fall 0.7 pct
By Scott Haggett and Allison Martell
April 4 (Reuters) - Canadian Pacific Railway Ltd raised its estimate of the amount of oil spilled in a derailment in northern Ontario a hundred-fold on Thursday, and said 400 barrels (16,800 gallons) had leaked from two tanker cars, up from its initial estimate of four barrels.
CP Rail spokesman Ed Greenberg said the size of Wednesday's spill, the company's second in a week, was not evident when crews first arrived at the remote site of the derailment near White River, Ontario, about 700 kilometers (400 miles) northeast of Toronto.
"During the clean-up yesterday our crews discovered the second derailed car containing oil had in fact lost product," Greenberg said. "The second car was difficult to assess due to its position among the derailed equipment but showed no signs of the product around its base during the initial assessments." Continued...