(Aug. 10) -- Toxic chemicals may have caused the death of 71 horses managed by the Nevada Bureau of Land Management.
High levels of nitrates were found in some water samples taken from a pond the horses used for drinking on the Nellis Range north of Las Vegas.
The chemical was also found in some of deceased horses' body fluids.
The animals died last month.
(Aug. 6) -- Eyewitness News has learned the number of dead wild horses found on the Tonopah Test Range is up to 71.
Test results from tissue from the horses and water samples are supposed to be in on Wednesday.
Channel 8 Eyewitness News and LasVegasNOW.com will have more information as it becomes available.
(Jul. 25) -- Federal officials are investigating the deaths of at least 55 wild horses and an antelope found near a watering hole on a ballistics and bombing range in central Nevada.
A Bureau of Land Management official in Las Vegas says tissue from the animals and water samples are being tested, and results could take up to a week.
The BLM and Air Force released a statement Tuesday saying the pond was believed to be the problem. It's on a dry lake bed on the Tonopah Test Range -- at least 210 miles northwest of Las Vegas. The area's home to about 250 wild horses.
Workers are fencing off the pond Wednesday and setting up storage tanks to offer fresh water to wild horses and burros.
The Energy Department and National Nuclear Security Administration also are involved in the probe.
(Copyright 2007 by The Associated Press. All Rights Reserved.)
