The State Security Service (SSS) has freed Salihu Tanko, a former media aide to the Kano State Governor, Abdullahi Ganduje.
Mr Tanko was arrested on Friday after calling on President Muhammadu Buhari to check Nigeria’s worsening insecurity or resign.
He was sacked by Governor Ganduje shortly after his arrest.
His father, Tanko Yakassai, confirmed that he was released late Monday evening.
That he was yet to be briefed on the alleged crime for which he was arrested and detained by the SSS.
Mr Tanko, on Twitter, saying the All Progressive Congress (APC) has failed Nigerians over the worsening insecurity.
Following the abductions of 27 schoolboys in Kagara, Niger State and 317 schoolgirls in Zamfara. He took to social media to express his anger.
He said the APC government “at all levels” has failed to deliver on its primary responsibility of protecting the lives and properties of Nigerians.
Mr Tanko, in a series of tweets, called on President Buhari to deal with the escalating insecurity or resign.