Silicon Valley entrepreneur Blake Krikorian, who co-founded home video streaming company Sling Media, has died, according to Recode.

Recode reports that the former Sling Media CEO died Wednesday. While the cause of death is unconfirmed, Krikorian apparently suffered a heart attack while surfing in the San Francisco area, the report said.

The 48-year old entrepreneur had also served on the board of Amazon and worked at Microsoft during his career.

On hearing the news of Krikorian’s death, a number of tech industry figures paid their respects on social media.

“Devastating news. Such an awesome guy. Hard to imagine,” tweeted Zynga founder and Executive Chairman Mark Pincus.

“Blake was an amazing friend. Wisdom, creativity, and child-like curiosity all in one. You'll be missed, Uncle Dude,” tweeted PayPal co-founder and entrepreneur Max Levchin.

Maker of the Slingbox streaming device, Sling Media was purchased by EchoStar Communications for $380 million in 2007.