OKLAHOMA CITY (AP) — An Oklahoma court has rescheduled the execution dates of three death row inmates for 2015 after the state said it needed more time to secure the necessary drugs and train the execution team on new protocols.

The Oklahoma Court of Criminal Appeals on Friday reset the execution date for Charles Warner to Jan. 15, Richard Eugene Glossip to Jan. 29 and John Marion Grant to Feb. 19. The court also scheduled the execution of a fourth inmate — Benjamin Robert Cole — for March 5.

Oklahoma has not carried out an execution since the April 29 lethal injection of Clayton Lockett, who writhed and moaned on the gurney. That prompted state officials to renovate the death chamber and develop new execution protocols.

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