Nine men were indicted Thursday on charges that they ran a human trafficking network within Greater Boston, the Massachusetts Office of the Attorney General announced.

Authorities who conducted a multi-jurisdictional investigation say they found houses in Chelsea, East Boston and Lynn that were fronts for a prostitution ring. Authorities say the suspects recruited victims, advertised sexual services and would take the victims to and from appointments.

Authorities say the victims rarely left the houses once they arrived and, if they did, it was always with one of the alleged ring leaders.

Nine people were charged multiple counts of human trafficking for sexual servitude, human trafficking conspiracy and owning or keeping a house of prostitution.

The suspects are Christina Lasso, 47, of Lynn; Jose DeBlas, 33, of Lynn; Jorge Lasso, 54, of Chelsea; Marlon Nagano, 37, of East Boston; Francisco Sanan Bay, 30 of Chelsea; Edmundo Rivera Gomez, 50, of Lynn; Donoban Yesid Arismendy Ospina, 25, of Lynn; Johann Haneo Torres, 35, of Lynn; Luis Londono, 44, of Marlborough;

Lasso, DeBlas, Nagano and Sasan Bay also were charged with money laundering.

They are scheduled to be arraigned Oct. 16 in Suffolk Superior Court. Lasso, DeBlas, gomez, Torres and Ospina will also be arraigned in Essex Superior Court at a later date, authorities said.

The nine suspects were arrested in July by Massachusetts State Police and arraigned in district court.