Gov. Jeb Bush is suspending all executions in Florida.
Friday's move comes after a medical examiner released preliminary findings that show this week's lethal injection of Angel Diaz was mishandled.
The medical examiner, Dr. William Hamilton, said officials botched the insertion of the needles, which pierced two veins and then went into soft tissue in Diaz's arms.
That execution took 34 minutes, more than twice as long as normal.