HOUSTON – Charges have been filed against two suspects arrested following an investigation into large-scale distribution of synthetic cannabinoids, or “Kush,” in Houston.

According to the Houston Police Department, the suspects, Minh Dang, 42, and Tuan Dang, 46, are charged with two counts each of engaging in organized criminal activity.

More than 30 pounds of illegal narcotics were seized in the operation, police said. In addition, investigators recovered a firearm, vehicles and thousands of dollars in U.S. currency and gold bars.

In June, investigators in the HPD Narcotics Division initiated an undercover investigation into an incident in which several homeless people became ill after consuming Kush in Hermann Park.

The Kush initiative targeted not only street-level dealers but also various locations where Kush was sold.

Police said further investigation identified a retail chain, "Spice Boutique," owned by the Dangs, whose three locations were found to be selling Kush. Both men were arrested on Tuesday and subsequently charged.

Four additional suspects, employees of "Spice Boutique," were arrested and face charges of engaging in organized criminal activity and falsifying drug test results, police said.

Photos of these four suspects were not released, pending further investigation.

"This is a another great example of the Houston Police Department's partnership and collaboration in our effort to protect the Houston community from dangerous substances that found their way to our streets,” HPD Assistant Chief M. Curran said. “Synthetic cannabinoids have been a large issue in our city and this particular operation was another major step in getting this illegal substance off our streets."

The enforcement efforts are continuing with more arrests and charges possible.