Zakzaky’s supporters staged a rally on Wednesday in defiance of the crackdown against them, Presstv Reported.
The protesters were carrying banners showing pictures of the cleric as well as people who lost their lives at the hands of government forces.
On Tuesday, security forces killed two protesters, who were members of the Islamic Movement in Nigeria (IMN), which is headed by Zakzaky.
Clashes erupted outside the National Assembly as protesters gathered there and then sought to enter the parliament to register a demand for the cleric’s release. Forty people were also arrested during the rally.
Sheikh Zakzaky, who is in his mid-sixties, lost his left eyesight in a 2015 raid by security forces that left more than 300 of his followers and three of his sons dead. His wife also sustained serious wounds.
The Islamic Human Rights Commission (IHRC), based in London, said earlier this week that the cleric’s health condition has further deteriorated, since he was reportedly poisoned in prison.
The cleric’s son, Mohammad, told Press TV on Saturday that his father was in dire need of medical treatment, as “large and dangerous quantities of lead and cadmium have been found in his blood.” He said that the authorities intended to murder his father since they refuse to take any measures.
In 2016, Nigeria’s federal high court ordered Zakzaky’s unconditional release from jail following a trial, but the government has so far refused to set him free.
According to human rights groups, Nigerian forces have killed at least 400 members of the IMN over the past four years.