YouTube star Caleb Logan Bratayley was announced dead by his family. The 13-year-old online celebrity died from an undetected medical condition as revealed by his family.

On social media, the mother of the late YouTube sensation posted that the shocking announcement.

"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," Caleb's mother wrote.

When the family tried to inquire health professionals to know the cause of Caleb's death, they were unable to detect anything. As written by the YouTuber's mother on Instagram, tests have confirmed that Logan's death was caused by an "undetected medical condition" which made the tragedy even harder for the family.

"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," his mother wrote.

The Logan family known as Bratayley are known for their trending YouTube videos. The family's channel has more than 1.6 million subscribers that can testify how famous they are online. The Logans regularly post vlog to entertain their subscribers and other YouTubers.

Now that Caleb Logan is gone, the family is asking for space and understanding from everyone. "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." On Twitter, many expressed their support for the Logan family for their loss.

On YouTube, the Logan family posted a video in honor for Caleb.

As a result of their online fame, the Bratayleys are now associated with a Disney-owned digital company called Maker Studios.