UPDATE: Scott Disick had reportedely enterered rehab over the weekend and will not be flying out to Las Vegas to visit Lamar Odom in hospital, as reported by HNGN.

Lamar Odom, former NBA player and ex-husband to reality star Khloé Kardashian, has been in a Las Vegas hospital since his body was found unconscious in a nearby brothel Tuesday, as previously reported by HNGN. Now his grandmother, Kylie Jenner and Kendall Jenner have reacted, and Scott Disick and Rob Kardashian are reportedly rushing to his side.

Odom was found around 3 p.m. Tueday in his room at Dennis Hoff's Love Ranch, a brothel located one hour outside of Las Vegas in Crystal, Nev. He was rushed to the Sunrise Hospital & Medical Center in Vegas, where drugs were found in his system, according to E! News. His condition is being treated as a drug overdose.

The basketball star, who reportedly checked into the Love Ranch Saturday, became "irate" Sunday after receiving a phone call about the season finale of E!'s hit reality series "Keeping Up with the Kardashians," TMZ reported. The episode featured Odom's reaction to the death of his good friend Jamie Sangouthai.

Khloé rushed to her ex's side Tuesday night, with sister Kim Kardashian West and mother Kris Jenner, when news broke about Odom's condition.

Kylie Jenner, Khloé's youngest sister, cut her live stream short on her app once she heard about the tragedy. "Had to end my live stream. I love you guys," tweeted Kylie.

Meanwhile, Khloé's sister Kendall Jenner sent out a cryptic message hours after everyone rushed to her former brother-in-law's side. "please don't go," she tweeted.

Rob Kardashian and Scott Disick are reportedly en route to the hospital in Las Vegas, according to Perez Hilton. Rob lived with his sister Khloé and Odom during their 4-year marriage. Disick, the former boyfriend of Kourtney Kardashian, bonded with Odom as the men of the Kardashian/Jenner clan.

So far, no one from Odom's side of the family has visited the hospital, but his paternal grandmother Florence spoke about the tragedy surrounding her grandson. "I'm praying to God," Florence told NBC News. "I'm asking God to please let him survive."