Banff wardens are investigating the unusual deaths of two grizzlies killed by another grizzly bear.
The two grizzlies --one male and one female --were killed while they were being trapped so wildlife officials could collar them and monitor their movements.
The trapping is part of an extensive program used to keep tabs on grizzlies in the back country.
That program has since been cancelled indefinitely while the deaths are investigated.
Such an incident has never been known to happen in the Banff area during trapping.
Although it's not unusual for grizzlies to be aggressive to each other over territorial matters, the bears are not known to prey on one another.
Wardens are still trying to determine if one or more grizzlies are responsible for the deaths of the bears..
Last week, a speeding motorist on the Trans-Canada Hwy. claimed the life of a grizzly bear cub near Lake Louise.
The female bear -- one of two orphaned cubs -- was trying to cross a stretch of road in a 70 km/h zone when she was hit by a car.
Wardens have grown increasingly concerned about the endangered grizzly population in light of the deaths.
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