Harris Wittels, known for co-exec producing Parks and Recreation and for his work on other comedies, has died of a possible drug overdose, sources confirm. He was 30.

According to the Los Angeles Police Department, he was found at around noon Thursday by his assistant at his home. Wittels had previously been open with his struggles with drug addiction, and has been to rehab twice.

Along with serving as an co-executive producer on NBC's Parks and Recreation, Wittels produced and wrote for The Sarah Silverman Program, Eastbound and Down and Secret Girlfriend. He was also a recurring guest on the podcast Comedy Bang Bang.

Parks and Recreation will air its final episode next Tuesday.

The Houston native has a large Twitter following , and is credited with creating the popular phase "Humblebrag." In 2012, he published Humblebrag: The Art of False Modesty, based on the tweets culled at a Twitter account he ran.

Wittels also performed stand-up comedy, and played drums and provided backup vocals for musical group Don't Stop or We'll Die with fellow comedians Michael Cassady and Paul Rust. The trio was scheduled for a performance at the UCB Theater on Feb. 28.