According to a report by SaharaReporters, the singer is held incommunicado.
Sharif-Aminu, was on Monday sentenced to death for committing blasphemy against the Prophet of Islam in a song he circulated via WhatsApp.
He was accused of committing the offence in March 2020 after which protesters burnt down his family house.
He has 30 days to appeal the judgment.
They boy may get infected where they are keeping him or exposed to cold. They have put a leg chain on him since he got in and he sleeps with the leg chain,
a prison official told SaharaReporters.
Several Nigerians have condemned the judgment of the Upper Sharia Court in Kano.
The Socio-Economic Rights And Accountability Project asked the Nigerian Government to immediately quash the death sentence, saying it amounts to violation of the right to freedom of expression.
Reacting to the issue, rights lawyer, Tope Akinyode, described the death sentence as preposterous and antithetical to democratic tenets.