Rob Kardashian, the troubled brother among the Kardashian siblings, allegedly went missing last weekend, according to MSN Entertainment.

In addition to his uncontrollable weight gain, Rob is rumored to have been battling depression for quite some time.

Rob made headlines when he compared his sister Kim to Amy Dunne, the female lead character in the thriller movie, 'Gone Girl'. Since then, Kim urged the Kardashian family to institute a 'tough love' approach for Rob.

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The 28 year old sock designer couldn't be located anywhere for the past three days. His mother Kris Jenner and sister Khloe, were on the verge of filing a missing person report related to his sudden disappearance.

Khloe was in Miami with on and off boyfriend French Montana when Rob went missing. She reportedly tried to contact him constantly.

"Rob had been at Khloe's house Friday morning, and left without telling anyone where he was going. Khloe was out of town but her assistant was at the house. After learning Rob had left, Khloé began calling and texting her brother to check-in," said a close source in the family.

"After not hearing from Rob for over 24 hours, she called her mom, Kris. Kris began calling Rob's friends, and dispatched staffers to go by Rob's condo. Rob wasn't at his condo and his friend had no idea where he was," the source further added.

Khloe was already frantic and wanted to call the police, while Kris emphasized that it wasn't necessary.

''She thought Rob would get very angry that the cops were called, and it would have created a media circus. Finally on Monday morning, Rob came back to Khloe's house, not offering any explanations for his whereabouts. His disappearance certainly wasn't a good thing, and Khloé is afraid it will happen again," said a close source, according to Radar Online.

Khloe recently expressed her growing concern about Rob. This could be seen in one recent episode of 'Keeping Up With The Kardashians', which she already urged Rob to accept help from them.

TagsRob Kardashian, missing