A woman and two men from China pleaded guilty in federal court in Las Vegas on Tuesday to reduced charges in what prosecutors say amounted to a $13 million illegal Internet gambling operation broken up by an FBI raid on high-roller suites at Caesars Palace.

Yan Zhang, 41, and the two men, Yung Keung Fan, 46, and Herman Chun Sang Yeung, 36, each pleaded guilty before US District Judge Andrew Gordon to misdemeanor accessory after the fact charges, admitting that they knew illegal wagers were being transmitted.

The trio of plea deals hinge on two more defendants pleading guilty on Wednesday: Seng Chen Yong, 56, to a misdemeanor accessory charge, and Hui Tang, 44, to felony illegal transmission of wagering information.