JACKSON, Wyo. (AP) -- U.S. Forest Service officials say a wolf attack in northern Wyoming injured one of the agency's horses, forcing workers to destroy it.

The attack occurred Thursday at the Blackrock Ranger Station on the Buffalo Ranger District of the Bridger-Teton National Forest.

Acting District Ranger Ray Spencer says a wolf either spooked the horse and prompted it to run across a cattle guard, or was actually attacking the horse when the horse ran across it.

Federal officials decided not to try to destroy the wolf because the coming elk migration should soon draw wolves to higher elevations.

Copyright 2010 The AP.

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