Virgin Atlantic founder Richard Branson wrote a letter on Tuesday asking the state of Oklahoma to stay the execution of death row inmate Richard Glossip.

The letter was published in a local paper, The Oklahoman, and also appeared on Virgin's website.

Glossip was set to be executed Wednesday at 3 pm Central Time. Minutes before the scheduled execution, Glossip was granted a 37-day stay by Governor Mary Fallin. In a statement, Fallin said the delay was granted because of "legal questions raised today about Oklahoma's execution protocols."

Glossip was convicted of hiring someone to kill his boss, motel owner Barry Van Treese, in 1997. Glossip has said that the actual killer, Justin Sneed, framed him and maintains his innocence.

Two weeks ago, the Oklahoma Court of Appeals ordered that Glossip's execution be delayed because of concerns about evidence presented in his initial trial and about the drug that would be used to execute him. But on Monday, the judge rejected Glossip's appeal.

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In the letter, Branson and "concerned citizens" said Oklahoma was about to "kill a man who may well be completely innocent."

Branson also said Glossip's case wasn't about whether or not the death penalty was right or wrong.

"This is about every person deserving a fair trial. Richard Glossip has not received this," the letter read. "Judge Johnson of the Oklahoma Court of Criminal Appeals has called Richard's trial 'deeply flawed.' Your state is about to execute a man whose guilt has not been proven beyond a reasonable doubt."

The letter urged concerned citizens to call the governor and ask to delay the execution for 60 days.

"No matter where you stand on the death penalty, you must agree that no innocent person deserves to die," the letter read.

Branson could not be immediately reached for comment after the governor issued the stay.