Khloe Kardashian’s husband Lamar Odom has been missing for 72 hours on a drug binge in the midst of cheating allegations, TMZ wrote Sunday. The athlete has been facing rumors that he cheated on his reality-television star wife with two different women and was reportedly kicked out of his marital mansion by Kardashian.

It’s been three days since anyone on either Odom’s side or Kardashian’s side have seen the NBA player, sources told the celebrity-news site, and people close to the 33-year-old athlete are worried. Kardashian reportedly tried to stage an intervention with Odom, who is apparently using crack cocaine, but he rejected the offer, which is why she threw him out.

The athlete has been dealing with addiction for two years, TMZ wrote, and he went into a rehab center reluctantly in San Diego last year but reportedly stayed for only three weeks. The NBA star supposedly fell into drug use after he became a free agent at the end of the last basketball season.

It’s no secret that the Kardashian-Odom marriage has been falling apart in the tabloids, but it was first believed it was because of the athlete’s infidelity. Now new sources are pointing to heavy drug use, which has worried everyone, TMZ wrote.

Before the drug stories about Odom began to make headlines, the adultery rumors ran deep, with Khloe Kardashian’s brother Rob Kardashian supposedly confronting his brother-in-law.

“Rob confronted Lamar and it got heated very, very quickly. Rob and Lamar have been close since he came into Khloe’s life,” a source told the celebrity-news site Radar Online. “When Rob asked Lamar point-blank if he had cheated on Khloe with criminal-defense attorney Polina Polonsky, he refused to answer the question. Rob grew angrier that Lamar didn’t respond, and he ended up just leaving the house. A lot of people bash Rob, but he truly has his sister’s back and is very protective of her.”

Kardashian also said she was protective of her family and took to Twitter to take out her frustration in an obscene tirade on Sunday: