Khloe Kardashian posts another cryptic photo of Rob!

Social media seems to be the only way Khloe can communicate with Rob these days, as the Kardashian star decided to post another cryptic message about her brother online.

The Keeping Up with the Kardashian star shared a sweet shot of her with Rob on Instagram.

The picture may be old but the message is clear, Rob is clearly on Khloe’s mind.

Sources say family have grown increasingly concerned about Rob’s behaviour of late, especially since photos were released last week of Rob taking suspicious substances.

Khloe is also said to be worried about Rob’s growing relationship with her ex-husband, Lamar.

This isn’t the first time that Khloe has reached out to Rob via Instagram — earlier this month, she posted a photo of herself and Rob as children with the caption: “I miss my best friend @robkardashian.”