An Islamic court has sentenced a Nigerian cleric to death by hanging for insulting the Prophet Muhammad in the northern city of Kano.
Abdulazeez Dauda, popularly known as Abdul Inyass, was convicted after a trial held in secret to avoid protests.
Five of his followers were also sentenced to death last year.
These are the first death sentences for blasphemy handed down by a Nigerian Sharia court; those delivered for other offences have not been carried out.
Mr Inyass is a preacher at a local faction of the Tijaniya sect, founded in Senegal by Sheikh Ibrahim Niasse, which has a large following across West Africa.
He was reported to have said that "Niasse was bigger than Prophet Muhammad" during a lecture at an event in May, leading to violent protests in the city.
The BBC's Yusuf Ibrahim Yakasai in Kano says he then fled to the capital, Abuja, and nine of his followers were arrested for their alleged part in organising the event.
When they were arraigned in court, there were further clashes and the courthouse was set on fire, he says.
Analysis: Muhammad Kabir Muhammad, BBC Hausa, Abuja
Anyone who is not satisfied with the judgement of a Sharia court can appeal to the Sharia Court of Appeal in the state within three months. From there the case can be taken to the federal Court of Appeal, which is secular and, finally, to the Supreme Court.
There are judges of the Court of Appeal who are learned in Islamic law and who would be convened by the court's president to hear the case.
The Sharia courts only try Muslims. If a case involves a Muslim and a non-Muslim, the non-Muslim will be given the option of choosing where he/she wants the case to be tried. The Sharia court can only hear the case if the non-Muslim gives written consent.
Amina Lawal, who was found guilty of adultery in 2002 and sentenced to death by stoning, was acquitted by a Sharia Court of Appeal.
Four of the followers were acquitted and the five sentenced to death are appealing against their conviction at the state's high court.
Kano has a predominately Muslim population and Islamic courts operate alongside secular courts.
Mr Inyass, whose five-month trial was held in secret for security reasons, will also be able to appeal against the verdict at the high court.
Several states in northern Nigeria introduced Sharia after the country returned to civilian rule in 1999.
Tijaniya at a glance
The Sufi sect of Tijaniya was founded in Algeria in 1784 by Ahmad ibn Muhammad al-Tijani.
It spread all over the world, with large following in North and West Africa. It also has followers in South Africa, Indonesia and other parts of the world.
There are other Sufi sects in Islam but Tijaniya is the largest.
They have three main daily practices: Asking the forgiveness of God; sending prayers to the Prophet Muhammad and affirming the Oneness of Allah.
Senegalese-born Sheikh Ibrahim Niasse was credited with reviving the sect in the 20th Century. People travel from across the continent to visit his shrine.
They have several factions including the Haqiqa (Realist) group, whose members were convicted of blasphemy in Kano.