Bob Lee, the founder of Cash App and former chief technology officer of Square, was fatally stabbed to death in San Francisco yesterday April 4. He was 43-years-old.

According to media reports, officers from the San Francisco Police Department responded to a report of a stabbing at around 2:35 am, where they found a 43-year-old man with what appeared to be stab wounds. He was taken to a hospital with life-threatening injuries where he later succumbed.

At the time of his death, he was serving as the chief product officer of the cryptocurrency company MobileCoin. He also assisted the World Health Organization with a Covid-19 mobile app and helped lead the development of an at-home Covid testing company.

In a statement Wednesday, the chief executive of MobileCoin, while praising Lee’s business acumen, confirmed his death saying he “passed away yesterday.”

“Bob was a dynamo, a force of nature. Bob was the genuine article,” Joshua Goldbard said. “He was made for the world that is being born right now, he was a child of dreams, and whatever he imagined, no matter how crazy, he made real.”

The incident is being investigated by San Francisco’s homicide department and no arrests have been made as yet.