Anyone with information is urged to contact the Yakima Police Department at (509) 575-6200 or by calling 9-1-1.
Tips can be also be reported to Yakima County Crime Stoppers by phone at 1-800-248-9980.
The Union Gap Police Department is asking the public's help in identifying the robbers. If you have information, call (509) 248-0430 and speak with detectives.