IDAHO FALLS -- Idaho Falls officials say someone poisoned a half-dozen green ash trees along a main city street.
City forester Delbert Lloyd says officials knew something was wrong when the leaves on the six 30-foot tall, 14-inch diameter trees failed to grow back this spring.
The Post Register reports the trunks were sprayed with glyphosate, a chemical found in the herbicide Roundup.
The loss is estimated at $18,000. A police investigation has not identified any suspects.
The trees on Lindsay Boulevard surround a sign for the Le Ritz Hotel and Suites. Lloyd says the city has received complaints about the trees blocking the sign, but there are no concrete answers about who poisoned them.
He says two other trees showed signs of poisoning but they were not as severely damaged.