The provided source material does not contain information regarding a city named Zina in Cameroon. Instead, it describes zinā as an Islamic legal term referring to unlawful sexual intercourse.
Under traditional jurisprudence, zinā encompasses acts such as adultery, fornication, prostitution, sodomy, incest, and bestiality. For an offense of zinā to be prosecuted, the act must have been committed of one's own free will. Legal requirements for conviction include either the testimony of four Muslim eyewitnesses to the actual act or a confession repeated four times without retraction.
The legal framework distinguishes these acts from rape, which is prosecuted under different categories using standard evidentiary rules. Additionally, accusing an individual of zinā without providing the required eyewitnesses constitutes qadhf, which is classified as a hudud offense.