The Kurdistan Human Rights Network, which said the incident was linked to the protests, said special forces entered the ward, beat up the women and fired pellet bullets.
In a separate incident, human rights group Hengaw said security forces opened fire in the Kurdish city of Mahabad, wounding at least one person.
Earlier, social media and reports by rights groups spoke of security forces taking up positions around Amini's home in Saqez, in western Iran.
Speakers led the crowd in chants of "Say her name ... Mahsa Amini," and also recited "We are the revolution" and "Human rights for Iran!"
Iran's Etemad daily reported in August that the lawyer for Amini's family also faced charges of "propaganda against the system".
Persons:
Mahsa, IRNA, Hengaw, Ayatollah Ali Khamenei, Mahsa's, Amjad Amini, Dilara, Amini, Joe Biden, Biden, Nasser Kanaani, Saqez, Saleh Nikbakht, Toby Chopra, Alex Richardson, Nick Macfie, Daniel Wallis
Organizations:
Revolutionary Guards, Islamic, Kurdistan Human Rights Network, REUTERS, United Nations, White, Iran's Foreign Ministry, Amnesty International, Thomson
Locations:
Iran's, Tehran, Kurdistan, Kurdish, Mahabad, Kermanshah, Saqez, Iran, Fars, Karaj, Mashhad, Istanbul, Turkey, In Washington, Britain, U.S, State, Iran's Kurdistan