Hong, 41, was the apparent victim of a burglary attempt, police said.
"The victIm was a dear friend of mine, who was staying at my place while I was away. I am heartbroken. " Stroumboulopoulos wrote on Facebook. He said he was in New York at the time and is returning to Los Angeles.
Police found Hong's body after they responded to a 911 call around 2 a.m. Friday.
Witnesses saw a man dressed in a black jacket fleeing from the scene, according to LAPD Officer Jenny Houser.
"There's so much to say but I'm at a loss for words so just love your people and I will have more to say when we know more about what happened," Stroumboulopoulos said in his Facebook statement.
In 2013, Stroumboulopoulos hosted a one-hour talk show on CNN.