Egyptian security arrested well-known activist and blogger Wael Abbas for "advocating the ideas and plots of the [terrorist-designated] Muslim Brotherhood organization through his social media accounts," Al-Ahram Daily newspaper reported on Thursday.
Abbas, an internationally renowned Egyptian journalist, blogger and human rights activist, was arrested from his home on Wednesday, according to Al-Ahram.
The 43-year-old is being questioned by State Security Prosecution, according to judicial sources.
Abbas, who was a fierce critic of the Brotherhood during the rule of ousted Islamist president Mohamed Morsi, has also been a strong critic of the government.
He was one of the pioneer bloggers in Egypt in the 2000s with his "Egyptian Awareness" blog, which fiercely criticized government policies during the rule of former Egyptian president Hosni Mubarak.