Arrested in Las Vegas
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.
UPDATE: Law enforcement sources tell TMZ Floyd has been released from custody.