On Saturday, the professor's family said that the Taliban had taken away Jalal in an unknown direction.
Women protesters rally in the streets of the Afghan capital, chanting that freedom of speech is not a crime and condemning the actions of the Taliban.
Jalal has made several appearances on television talk shows since the fall of the US-backed government in August, blaming the Taliban government for the worsening economic crisis and criticizing the movement for forceful monopolization of power.