(Salem, OR) -- Donations have increased a reward for information that leads to an arrest or citation in the poisoning of wolves in northeast Oregon to more than 36-thousand dollars. Earlier this year, eight wolves died from poisoning in Union County. Several groups, including Wolves of the Rockies, Oregon Wild, and the Humane Society of the United States contributed to the reward. Oregon State Police are investigating and they're asking for information that helps identify a suspect.