Woman killed in rare attack by black bear in remote Alberta forest

Victim was mauled while planting trees after logging operation

Police in Canada say a 26-year-old woman working on a tree-planting operation in Alberta was killed by a black bear on Saturday, in a rare attack by one of the country's largest predators.

The woman was mauled by what witnesses believe was an adult black bear in a remote area of northwest Alberta. A co-worker who witnessed the attack helped scare off the bear before calling for help.