Egyptian police detained the youngest son of ousted former president Mohamed Mursi at home on the outskirts of Cairo, his brother and three security sources said.
Two security sources said Abdullah Mursi was arrested on charges of “spreading false news”, in connection an Associated Press news agency interview last week that focused on his father’s detention.
In the interview, Abdullah said his father’s health deteriorated due to prison conditions and the family was rarely allowed to visit.
Abdullah’s brother Ahmed told Reuters police officers did not present an arrest warrant and said they were taking Abdullah for questioning.
An interior ministry spokesman could not immediately be reached for comment.
The former president, a senior figure in the Muslim Brotherhood, has been jailed since he was overthrown by the military in 2013, following mass protests against his rule.
Abdullah is the youngest of his five children. Another son, Osama, is also in prison and was among hundreds recently sentenced in connection with protests against Mohamed Mursi’s overthrow.
After Mursi’s ousting, then-army chief and now President Abdel Fatah al-Sisi unleashed a fierce crackdown on the Brotherhood.
Sisi supporters say the president, re-elected in March, is trying to combat an Islamist insurgency and restore order following years of chaos after “Arab Spring” demonstrations forced Hosni Mubarak to step down in 2011.