According to local accounts, John McAfee, the antivirus software entrepreneur who faced extradition from Spain to the United States on tax-related criminal charges, was found dead.

Attempts were made to resuscitate McAfee, who was captured at a Barcelona airport last October, according to the Spanish news outlet El Mundo.

McAfee was discovered dead inside his cell, according to a federal official. The reason of death is being probed, according to authorities.

Earlier in the day, Spain's National Court granted McAfee's extradition to the United States, where he was wanted on tax-related criminal accusations that may result in a 30-year jail sentence.