The McLennan County Sheriff's Office has announced two arrests in connection with a major international human trafficking bust.

Since September 2016, detectives have been investigating human trafficking in the Waco area. Investigators said a crime ring was bringing women from China and using them for prostitution at sites around the U.S. -- including here in Central Texas.

In the last six months, warrants were served in Austin, Houston and New York City -- as a result of that investigation.

McLennan County Sheriff's Office Detective Scaramucci, and an agent with Homeland Security, worked with the NYC Queens North VICE Unit to arrest Ling Yu in New York City. Yu has since been indicted by a McLennan County Grand Jury for engaging in organized crime.

Another suspect -- Hang Zheng -- was arrested Tuesday in Austin on the same charge. On Thursday, a search warrant was executed at Zheng's home, where law enforcement seized cash and a $38,000 Rolex watch -- bringing the total cash and assets seized during the course of their several-month investigation to $115,000.

There are currently outstanding warrants for two other suspects: Zhao Chen Shi and Xubin Zou, according to the McLennan County Sheriff's Office. Investigators said both of them were also tied to organized crime.

Investigators said 16 Chinese women are believed to have worked for the suspects in the following locations: Waco, Houston, Austin, Brooklyn, Queens, Indianapolis, Washington, D.C., Boston, New Orleans, Galveston, Victoria and Canada.