The Guardian:

Lawyers for a convicted killer filed an emergency court appeal on Wednesday to stop his execution, claiming that he was alive and gasping more than an hour after the state of Arizona began the process of killing him.

Attorneys for Joseph Wood said in the court filing that he had been "gasping and snoring for more than an hour", but had not yet died.

"We respectfully request that this court stop the execution and require that the Department of Corrections use the lifesaving provisions required in its protocol," the laywers said.

At 7pm ET, it was not clear whether Wood was alive or dead.

Just now, via Buzzfeed: