(CNN) Oklahoma state officials announced Thursday that the state will resume executions by lethal injection, having found a "reliable supply."

A ban on executions was put in place several days later as the state investigated whether the wrong drug was mistakenly used and a grand jury reviewed the execution protocol.

The state will now use a revised version of the protocol that includes recommendations from the 2016 multicounty grand jury.

"I believe that capital punishment is appropriate for the most heinous of crimes and it is our duty as state officials to obey the laws of the state of Oklahoma by carrying out this somber task," Gov. Kevin Stitt said at a news conference

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