A Big Sandy Federal Prison inmate is dead.
The Martin County facility is on lockdown.
Officials say 35-year-old Vincent Smith was involved in an incident with another inmate Wednesday afternoon.
He was taken to the hospital where he later died.
Officials have not released the cause of death and say an autopsy will be performed.
Smith was serving a life sentence for a murder in Washington D.C.
The name of the other inmate involved was not released.