Three Ameren Missouri employees were injured late Tuesday afternoon in an accident at the Callaway Nuclear Power Plant near Reform.
The company said the accident occurred in the switch yard of Callaway Energy Center at 5:06 p.m. in a short statement issued nearly five hours later.
The cause of the incident is being investigated, the company said, without providing any details.
The power plant operations "have not been impacted by the incident, and the facility continues to operate safely," the company said.
The three employees were not identified.
"Our first concern is for the well being of our co-workers," the statement said. "Out of respect for the privacy of the employees and their families, we are not providing details of their status at this time."
No one was available from the South Callaway Fire Protection District.
But a supervisor for the Callaway County Ambulance Service said the fire district and ambulance service responded to the plant.
However, he was not able to provide any details, referring a reporter to Ameren.
Neither the Ameren news release, nor a company spokesman reached by telephone, provided information to confirm, or deny, a television report that the "incident" was an electrical explosion and that one of the employees was flown to University Hospital in Columbia for treatment.