"Two women extremists from the terrorist cell that was recently dismantled and whose members had pledged allegiance to the so-called Islamic State were arrested Thursday in Tangiers," a ministry statement cited by the official MAP news agency reported.
It said the pair had also been to "Al-Qaeda camps in Afghanistan and Pakistan".
On Tuesday, the authorities said eight people had been arrested over alleged plots to carry out attacks mainly targeting security officials on behalf of IS.
It said the eight had been in contact with IS leaders and given refuge to fighters who had received "intensive training in producing explosives and gang warfare".
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It said members of the network were planning "a series of terrorist operations" against security officials and sensitive sites.
Morocco, which is on guard against deadly attacks of the type carried out by IS in Tunisia, prides itself on being a bastion in North Africa against Islamist extremism with its anti-jihadist unit and training of imams to preach tolerance.