Cash App Founder and MobileCoin Chief Product Officer Bob Lee was stabbed to death early Tuesday morning.

According to NBC Bay Area, the tech executive was stabbed near the Bay Bridge and Rincon Hill. Officers responded around 2:35 AM. Lee was taken to a nearby hospital, where he died from his injuries.

No arrests have been made, but the SFPD is asking for help:

Anyone with information is asked to call the SFPD 24-hour Tip Line at 1-415-575-4444 or Text a Tip to TIP411 and begin the text message with SFPD. You may remain anonymous.

In the meantime, MobileCoin CEO Josh Goldbar gave the following statement to NBC Bay Area:

Our dear friend and colleague, Bob Lee passed away yesterday at the age of 43, survived by a loving family and collection of close friends and collaborators.

Bob was a dynamo, a force of nature. Bob was the genuine article. 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.

Bob was made for the new world, he was the quintessential creator, leader, and consummate hacker. From large contributions to Android at google, to being the first CTO of Square, in that time creating CashApp, and working with us here at Mobilecoin, Bob surely had an impact that will last far beyond his short time on earth.

This may sound impressive, but Bob’s real resume is the hearts and minds he touched in his time on earth. Bob’s legacy is the feeling that you can make a difference if you try, and of course his amazing children. Bob first came to MobileCoin as an early-stage investor and advisor because he believed in the vision of privacy in commerce. He then came on as our Chief Product Officer and helped launch our Moby app, delivering to the work a best-in-class, non-custodial wallet to support the goal of private payments for all. Crypto never saw anything like this before – Moby broke ground and continues to do so.

Bob believed in the dignity of privacy. He wanted a world where you and I could transact free from the prying eyes of predatory corporations and criminals. We are grateful for and humbled by all he has done for us and to grow MobileCoin’s vision.

Steve Jobs said that “Real Artists ship” Bob was a real artist who shipped. Again and again and again. And we will keep on shipping, channeling Bob’s enthusiasm and spirit.

Here’s to the crazy ones. We will miss you Bob. We love you.

For now, MobileCoin will mourn. We turn our attention to honoring Bob’s legacy by holding his loved ones close.