DAKOTA CITY, Neb. (AP) - Authorities say a construction worker has been injured in an accident at the Tyson plant in northeast Nebraska's Dakota City. Medical workers were sent to the plant around 2 p.m. Monday. The worker was flown to Mercy Medical Center in Sioux City, Iowa. Tyson spokesman Gary Mickelson says the injured person worked for an outside contractor. The person's name and condition haven't been released.