As two-time NBA champ Lamar Odom fights for his life at a Nevada hospital, his children joined the Kardashian family by his side.

Odom was found unconscious at a brothel in Crystal, where he spent four days before he was rushed to hospital Tuesday.

He had been using cocaine on his first day at the brothel Saturday, employees told 911 dispatchers, according to authorities.

On a 911 call played at a news conference, a woman said she also saw him take 10 herbal supplement tablets over three days.

The brothel's employees told 911 operators that when they found him Tuesday, he was lying in bed on his side with a pinkish fluid coming from his mouth and nose.

He was taken to a hospital in Las Vegas, about an hour's drive from Crystal.

Odom was married to reality television star Khloe Kardashian for four years before she filed for divorce in 2013, citing irreconcilable differences.

The two signed divorce papers this year, but the divorce has not been finalized, a source told CNN.

As a result, Khloe Kardashian will make medical decisions for the former NBA star, the source said.

Despite the couple's estrangement, the Kardashians rallied to his support. Khloe Kardashian rushed to his side, together with her sister Kim Kardashian and the Kardashian's matriarch, Kris Jenner. They have been at the hospital by Odom's side since Tuesday night.

"Please pray for Lamar #ourfighter," Jenner posted on Instagram

Odom's former brother-in-law, Rob Kardashian, also expressed concern.

"Praying nonstop for my Brother!!" he posted on Instagram with a picture of the two of them.

In addition to appearing on "Keeping Up With the Kardashians," Odom and Kardashian had their own reality show, "Khloe & Lamar." It lasted for two seasons and 20 episodes.

While they went their separate ways after their divorce, Khloe Kardashian has said she will always love him.

"I will never, ever not love Lamar," she told E!, which airs their reality shows. "I was so obsessed with him in a healthy way. He was my husband, and I still wish he was."

Odom's father and two children are with him at the hospital, the source said.

Officials haven't said what was wrong with Odom, and his condition remains unclear.

The Rev. Jesse Jackson, who visited him Wednesday, said the former basketball star was on life support and is not conscious.

Odom, 35, won two NBA championships as a forward for the Los Angeles Lakers.

He played for four teams during his 14 seasons in the NBA and won the Sixth Man of the Year Award during the 2010-11 season.

The Los Angeles Clippers drafted Odom in 1999, and he played for the team for four seasons before signing with the Miami Heat.

After one season in Miami, he was traded to the Lakers, and became a key part of their championship teams in 2009 and 2010.

A year later, he played briefly for the Dallas Mavericks before returning to the Clippers for one season. He has not played in the NBA since then, though the New York Knicks signed him during the offseason last year, only to cut him three months later.

Outside of basketball, Odom has continued making headlines, including for a drunken driving charge two years ago. He pleaded no contest and received three years' probation.