We're told Mayweather was at a casino on the strip when a security guard recognized him and called the Las Vegas police.

Mayweather, who was all smiles in his latest mugshot,  is still in custody.

As we first reported, a security guard patrolling Floyd's gated community claims the boxer poked him in the face when confronted about a parking violation.

If convicted Mayweather faces a maximum of 6 months in jail.

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The Las Vegas Sun reports that Floyd Mayweather Jr. was arrested on the Las Vegas Strip last night.

He was charged with a misdemeanor battery complaint for allegedly poking a security guard in the face.

Mayweather remained in custody early Friday at the Clark County Detention Center.

The Nov. 15 confrontation was over parking tickets and Mayweather faces six months in jail and a $1,000 fine if convicted.

Mayweather is 41-0 as a pro but has fought just three times since December 2007.

He was in negotiations last year to fight Manny Pacquiao but the deal fell apart. Said Pacquiao on Friday: "He's facing so many problems. I hope he solves them soon so he could go back to the ring."