The Kardashians' concerns for the youngest sibling, Rob, are growing.

The 27 year-old has been surrounded by drug rumors for months and these seem to have been confirmed after he was pictured smoking marijuana while being surrounded by cups of sizzurp.

In the leaked photos, taken only days ago, Rob can be seen exhaling smoke and passing what appears to be a lit joint to a pal.

On the table next to him appears to be a double cup, which is what sizzurp drinkers tend to favour.

Another plastic cup containing purple residue, which is the colour of sizzurp, is also visible.

TMZ reports, Rob has been pushed to enter rehab by his family for his "very bad drug problem," and they have even been calling around different facilities to find out which is the best suited for him.

However, the sock company owner is just refusing to go.

"He feels completely estranged from his sisters and family," a source told RadarOnline. "He really isn't in a good place."

This comes only days after it was heavily reported that Rob hasn't communicated with Kim since her wedding to Kanye West in Italy on May 25th. He is also allegedly refusing to return phone calls and texts from Khloe, who he was supposedly very close to.

More: Khloé Kardashian worried about leaving Rob Kardashian in charge

The reality TV star "has no reason to talk to Kim," a source revealed, adding that "they haven't been on good terms for a very long time."

Reportedly, Kim "hasn't bothered to even attempt to talk to him since returning from her honeymoon, [while] Khloé has sent him text messages and left him several voice mails," another source said.

More: Rob Kardashian to join The Biggest Loser?

Adding, "Rob hasn't returned any of Khloé's phone calls or texts. He feels completely estranged from his sisters and family. He really isn't in a good place."

This isn't anything new for the Kardashians as they attempted to help Khloe's estranged husband Lamar Odom kick his drug habit.

Rob Kardashian
Rob was photographed smoking weed