Sokoto, Nigeria, announced a 24-hour curfew after protesters took to the streets last week to demand the release of two suspects in the murder of a Christian student.
Deborah Samuel beaten and burned by Muslim students accused her of making ‘blasphemous’ remarks Discuss Islam in a WhatsApp group on Thursday.
Her death was widely condemned by Muslims and Christians across Nigeria.
Demonstrators burned tires and police fired tear gas on Saturday.
Some protesters besieged the palace of Mohammad Saad Abubakar, the Sultan of Sokoto and the highest spiritual figure among Nigerian Muslims.
Sudan condemned the killing at the Shehu Shagari Institute of Education and demanded justice for those involved.
When the curfew was announced, Sokoto Governor Aminu Waziri Tambwar urged protesters: “For peace, please go home.”
Nigeria is the most populous country in Africa, with most people in the Muslim-majority north and the Christian-majority south being religious.
Religious tensions and deadly clashes are not uncommon, especially in the north, where some states have passed strict Sharia law, including the death penalty for blasphemy.
Blasphemy in Islam includes mocking or belittling the attributes of a religion and denying any of its fundamental beliefs.
President Muhammadu Buhari condemned Ms Samuel’s killing and said there should be an impartial investigation.
Nigeria’s largest Christian church group is demanding authorities bring the perpetrators to justice.