Caleb Logan Bratayley Has Died at 13

— -- YouTube celebrity Caleb Logan Bratayley has died from an "undetected medical condition," his family said in a statement.

The 13-year-old’s mother wrote on Instagram that he died Thursday of natural causes.

“This has come as a shock to all of us. Words cannot describe how much we will miss him,” she wrote. “His incredibly funny, loving and wonderful spirit made us all fall in love with him as a YouTuber, friend, brother and son.”

In a statement posted later on Instagram, the family said: "Sadly, tests have confirmed today that Caleb passed away from an undetected medical condition. We'll have more definitive answers in the coming weeks but ask that you help us celebrate his life instead of focus on his death."

Bratayley (a pseudonym) and his family have a popular YouTube channel with more than 1.6 million subscribers. Since Caleb’s death, however, they have paused their daily vlog uploads.

“We know you tune in to watch each day and eagerly anticipate new videos, but ask that you bear with us while we deal with this tragedy as a family,” his mother wrote on Instagram. “Please help us honor our baked potato.”

The family shared a video Saturday evening that was taken the day before he died, in which Caleb discussed what he’d like to ask his future self. (“Is Taco Bell still around? … Are there any new sports?” were his answers.) The next day, they shared a montage of Caleb and his two sisters through the years, which included scenes from his baseball game earlier in the week and moments from a docu-series he and his family were making with ABC News-Lincoln Square Productions about the American Revolution and the 2016 presidential race.

The Bratayleys are associated with Maker Studios, a Disney-owned digital company. Disney is also the parent company of ABC News.

"Yesterday at 7:08PM Caleb Logan Bratayley passed away of natural causes. This has come as a shock to all of us. Words cannot describe how much we will miss him. His incredibly funny, loving and wonderful spirit made us all fall in love with him as a YouTuber, friend, brother and son. We know you tune in to watch each day and eagerly anticipate new videos, but ask that you bear with us while we deal with this tragedy as a family. Please help us honor our, baked potato."