Dave Goldberg's official cause of death was craneocephalic trauma and hypovolemic shock, according to the prosecutor's office in Nayarit State, Mexico
Credit: Courtesy Sheryl Sandberg

SurveyMonkey CEO Dave Goldberg TK.

Goldberg, who was married to Facebook COO Sheryl Sandberg, died of head trauma Friday night after he slipped on a treadmill during a family vacation in Mexico, according to an informative note released by the prosecutor’s office in Nayarit State. He was 47.

The note lists Goldberg’s official cause of death as craneocephalic trauma and hypovolemic shock.

“This is due to excessive bleeding from the injury to the back of his head,” Christian Meza of the prosecutor’s office tells PEOPLE.

“Some media are reporting that he suffered arrhythmia of the heart, but that was not the official cause of his death,” he adds. “It could have been a factor.”

Under Mexican law, it’s standard procedure for authorities to open a criminal investigation into the cause of death and perform an autopsy when there is a dead body in a hospital. However, Meza says, “The understanding is that this was an unfortunate accident. There was no evidence of violence or that he was attacked. Nevertheless, the prosecutor’s office must continue investigating every case until it is closed.”

Goldberg had been vacationing with his family at the Palmasola villas next to the Four Seasons Resort in Punta Mita, The New York Times reports. According to the informative note, on May 1, Goldberg went to the gym at the private villas where, while exercising on a treadmill, he slipped and fell, injuring the back of his head on the right side and causing a wound of approximately three centimeters wide. He was found by his brother Robert Goldberg, who contacted emergency services to transport his brother to San Javier Hospital, where he later died.

“When his brother found him, he had a blow in the back of the head,” Meza says.

Nearly 2,000 friends, family members and colleagues gathered to mourn him in a private memorial service on Tuesday, where Sandberg said, “Today we will put the love of my life to rest, but only his body his spirit and soul are still with us.”

The social media executive also took to Facebook to express her grief in an emotional post. “Things will never be the same,” she wrote. “But the world is better for the years my beloved husband lived.”