The sudden death last week of SurveyMonkey CEO and husband of Facebook COO Sheryl Sandberg, David Goldberg, was shrouded in a bit of mystery. But as of late yesterday news outlets were reporting that Goldberg had been found unconscious, and with severe head trauma, in the gym at the Four Seasons Punta Mita resort outside Puerto Vallarta, Mexico. A Mexican state official confirmed for the Associated Press that Goldberg "left his room at about 4 p.m. to exercise, and family members went to look for him after he didn't return. He was found at about 6:30 p.m. in a gymnasium lying by a treadmill in a pool of blood, with a blow to the lower back of his head."

He later died of his injuries at a hospital in Nuevo Vallarta.

Sandberg and Goldberg's family had checked into the resort on Thursday, April 30, and the accident occurred on Friday afternoon.

Weirdly, though perhaps for legal reasons, the Four Seasons issued an official statement saying that "the incident did not happen on any of its properties and that David Goldberg was not registered as a guest in any of the rooms, villas or residences."

As KQED reports, family and friends are gathering today at Stanford University for a private memorial. In keeping with Goldberg's hatred of ties, all male guests have been asked not to wear ties.

Also, President Barack Obama is among those paying tribute to Goldberg, on Facebook, in this time of mourning.

Previously: David Goldberg, SurveyMonkey CEO And Husband To Sheryl Sandberg, Dies Suddenly