Lamar Odom has been missing for 72 hours

(Update: 1:56 p.m. EDT Lamar Odom's agent has said he is not missing.

{b:Original story follows: } Amid allegations of NBA star Lamar Odom cheating on wife Khloe Kardashian, rumors have surfaced that Odom may be abusing drugs.

Now, Odom has gone missing. The Kardashian family has not been able to contact him for more than 72 hours.

Khloe Kardashian reportedly threw him out of the house Wednesday after Odom rejected her intervention. Odom has battled addiction for two years, and went to rehab in San Diego last year. He checked out of rehab after just three weeks, however.

A representative for Odom said that he was OK, but would not comment on his whereabouts.