Bob Lee, a technology executive who founded Cash App, a mobile payment company, was stabbed and killed in San Francisco.
Lee was found with apparent stab wounds and taken to the hospital where he died of his injuries.
Lee was previously the Chief Technology Officer of Square, a financial technology start-up co-founded by Jack Dorsey, and had been working as the Chief Product Officer of the cryptocurrency company MobileCoin.
Lee was a successful entrepreneur, investor in Elon Musk’s SpaceX venture and other tech firms like Clubhouse.
Lee was a supporter of the World Health Organization and contributed his expertise in building the server for the WHO Covid-19 App.
Lee was living in Miami with his father since October, but it was not clear why he was in the Bay Area.
Lee's family and friends, including his former wife and children, paid tribute to him, describing him as a special person who was kind, down-to-earth and a great listener.
The fatal stabbing could intensify scrutiny of public safety issues in San Francisco, where residents and business owners have grown increasingly concerned about violent crimes and thefts.
Mayor London Breed has pledged to crack down on crime, as the city has had 12 homicides since the beginning of the year, according to data compiled by the police department.
Lee's death was mourned by many, including Jack Dorsey, who called him instrumental to Square and Cash App, and Elon Musk, who said he was "very sorry" to learn of Lee’s death.