Buffalo, NY (WKBW) - An infestation of Emerald Ash Borer was discovered in the Queen City this week. Experts say about a dozen trees within Buffalo's South Park have been infested with the beetle. According to the Department of Environmental Conservation, the beetle tunnels just below the tree's bark and disrupts water and nutrient transport which eventually kills the tree. It's still unclear how far this beetle has spread within Erie County or how it got here. The Emerald Ash Borer specifically kills North American ash tree species. In 2009, the D.E.C. discovered and infestation of the insect in Randolph and are still treating trees down in the Southern Tier.