BOISE — Two people were arrested in Boise after a monthslong investigation and charged with drug trafficking and possession on Thursday.

According to a release from the Boise Police Department, Sharma Anderson, 47, of Boise, and Lindsay Marks, 43 of Happy Valley, Ore., were arrested and booked into the Ada County jail on charges of trafficking in heroin, possession of a controlled substance and possession with intent to use drug paraphernalia.

The heroin, which the release said was destined for sale in Boise and surrounding communities, had a wholesale value of $50,000 and an estimated street value of $200,000.

Police intervened as the women were allegedly delivering 20 ounces of heroin in downtown Boise. The arrests are the result of a collaborative investigation, which in May began looking into a multistate heroin trafficking organization.

Boise’s narcotics unit and the U.S. Drug Enforcement Agency’s Boise District Office are working together on the investigation and to date have seized 3 pounds of heroin and made multiple arrests.

“With these arrests and seizures, we have prevented a dangerous amount of illegal narcotics from reaching the streets of Boise,” Boise Police Lt. Tim Kukla said in a news release. “We would like to recognize the invaluable partnership we have with the DEA which allowed us to see this investigation cross state lines and put a stop to a large scale trafficking operation in our region.”

The investigation is ongoing, and more arrests are expected.