This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

Authorities in Northern California are investigating possible drug cartel activity after four Modesto brothers say they were kidnapped, tortured and forced to work for more than five months on an enormous, illegal marijuana farm under the threat of violence.

The Calaveras County Sheriff’s Department this week announced the arrest of two women. Guadalupe “Lupe” Arrellano, 43, and Medarda “Daniella” Urbieta Estudillo, 34, were arrested Sept. 14 in Modesto and charged with human trafficking, kidnapping, battery with serious bodily injury, making terrorist threats and drug charges, authorities said.

Sheriff’s officials said they are still seeking two men in connection with the case.

In February, Arrellano picked up two men from a Modesto business known as a place where day laborers congregate, Calaveras County Sheriff’s Capt. Jim Macedo said at a news conference. She told the men she needed help working on a landscaping project at a home in Calaveras County.

Click here to read the full story on LATimes.com.