Oklahoma authorities stopped one execution Tuesday and postponed another after botching the delivery of drugs.
Convicted murderer Clayton Lockett was sedated and then given the second and third drugs in the protocol, Oklahoma Department of Corrections Director Robert Patton told reporters.
"There was some concern at that time that the drugs were not having the effect, so that doctor observed the line and determined that the line had blown," he said.
When asked what he meant by "blown," Patton said that Lockett's vein had "exploded."
"I notified the attorney general's office, the governor's office of my intent to stop the execution and requested a stay for 14 days for the second execution scheduled this afternoon," said Patton.Lockett later suffered what appeared to be a heart attack and died, the director said.