Security forces on Tuesday arrested controversial preacher Mahmoud Shaaban, and referred him to the general prosecution for questioning, a security official told MENA.
He was arrested for "inciting violence," a security official told Aswat Masriya.
Security forces had also briefly stopped Shaaban on Sunday night while he was leaving the Media Production City, after he appeared on a show hosted by Wael El-Ebrashy on Dream 2 private satellite channel. They checked his criminal record to see if he was wanted for investigation in any case, then released him.
Al-Azhar, Egypt's main Islamic university, suspended Shaaban in early November over allegations he incited violence and violated the parameters of his job as a professor of Islamic and Arabic studies at Al-Azhar in Kafr Al-Sheikh.
A video was published on social media websites last month of a speech by Shaaban in which he referred to ISIS as fellow Muslims who had "made mistakes and whom we are obliged to guide and mentor."
Shaaban was also arrested and released on bail in February 2013 under president Mohamed Morsi's rule, after issuing a fatwa sanctioning the killing of opposition politicians.