American basket ball player Lamar Odom reportedly underwent surgery on Thursday—after he was airlifted to Los Angeles on Monday for additional treatment.

It’s unclear if the surgery were related to his heart or his lungs—E! News is reporting that the procedure was related to “chest issues.”

Lamar Odom is currently receiving medical care at Cedars-Sinai Medical Center after spending a week at Sunrise Hospital in Las Vegas.

Reports indicate that Doctors are planning to put him under a “fragile mental” treatment and that will prevent people from visiting him—until his condition improves.

His estranged wife Khloe Kardashian who called off their divorce due to his hospitalization is still by his side—as he is slowly making steps towards recovery.

“This past week has been incredibly difficult. I am so thankful to family, friends and fans who have sent nothing but prayers and well wishes to Lamar,” the 31-year-old Keeping Up With the Kardashians star wrote.

“I also want to take a moment to thank everyone at Sunrise Hospital, including the amazing doctors and nurses for their kindness and diligent work. Under their amazing care, incredible strides have been made,” Khloe wrote on her website on Tuesday.