Chandler Jones was arrested early Thursday morning in Las Vegas, TMZ Sports has learned ... just hours after the Raiders star broke down in tears on social media.
The 33-year-old All-Pro was booked into Clark County Detention Center in Nevada around midnight ... where Jones still remains behind bars.
The exact details surrounding the arrest are currently unclear, but our sources tell us Chandler violated a protective order, so cops responded and arrested him.
Our law enforcement sources tell us the Super Bowl champion was cooperative while being taken into custody.