Retired basketball icon-turned-commentator Charles Barkley is under investigation by Las Vegas officials after reportedly building up gambling debts of $400,000.

The 45 year old has been targetted by the District Attorney's office after casino bosses at The Wynn Las Vegas filed suit against the former NBA star on Wednesday.

According to court documents, which have been obtained by TMZ.com, the casino chiefs let Barkley borrow four 'markers' worth $100,000 apiece during a gambling spree in October, and the basketball great has yet to return the cash.

Barkley, who has acknowledged an addiction to gambling in the past, faces felony charges if the sum is not paid, according to Clark County District Attorney David Roger.

(This news article provided by World Entertainment News Network)