Bob Lee, the founder of CashApp, was fatally stabbed in San Francisco.

No arrests have been made by the San Francisco Police Department yet.

Bob Lee, 43, was a Bay Area tech executive and the former CTO of Jack Dorsey-owned Block  

He was found dead after being stabbed on the 400 block of Main Street in SoMa, San Francisco

First responders were called to the scene and provided medical assistance

Lee was taken to a hospital, where he succumbed to his injuries 

The San Francisco Police Department is investigating the incident

A flood of tributes has poured in on social media eulogizing the executive

Jack Dorsey and Bill Barhydt have shared their condolences on social media