After a six-year pause, Oklahoma carried out its third consecutive botched execution Thursday, causing 60-year-old John Marion Grant to vomit, convulse and curse as he was killed with a lethal injection of three drugs.

Grant was killed with the same three-drug combination that was used in the infamous 2014 execution of Clayton Lockett, who writhed in pain and whose killing took 43 minutes. Locketts execution was followed by that of Charles Warner in 2015, who cried out that his body was on fire after being injected with the drugs. Richard Glossip was scheduled to die later that year, but then-Gov. Mary Fallin (R) called off the execution at the last minute because the corrections department had the wrong combination of drugs. Warners autopsy report later revealed that he, too, had been executed with the wrong drugs.

Sean Murphy, an Associated Press reporter who witnessed Grants execution, said he convulsed about two dozen times after the injection of the first of three drugs, midazolam, and began to vomit. The vomit covered his face and ran down his neck and the side of his face, Murphy said. Murphy, who has observed 14 executions, said this was the first time he had seen an individual vomit during an execution .

Based on the reporting of the eyewitnesses to the execution, for the third time in a row, Oklahomas execution protocol did not work as it was designed to, Dale Baich, a lawyer for a group of people on death row who are challenging Oklahomas execution protocol, said in a statement. This is why the Tenth Circuit [Court of Appeals] stayed John Grants execution and this is why the U.S. Supreme Court should not have lifted the stay. There should be no more executions in Oklahoma until we go trial in February to address the states problematic lethal injection protocol.