State security prosecution officials said authorities were questioning Mona Mahmud Mohammad, who was named in the BBC report as "Um Zubeida", or the mother of Zubeida.
She is being investigated over accusations that she had spread false news and for joining an organisation set up illegally, they said.
The mother was arrested on Wednesday.
The BBC report, aired last weekend, referred to the case of a young woman whose mother said she had been the victim of a forced disappearance.
On Wednesday, the prosecution said it had tasked lawyers with monitoring news outlets and social media to "take necessary measures under the criminal law" against "false statements, news and rumours that harm public safety".
Egypt's State Information Service, which regulates foreign media, has called on the British broadcaster to retract its report or face a government boycott.
A BBC spokesperson, however, said: "We are aware of the reports about this BBC story on Egyptian TV and of the comments of the head of the State Information Service. We stand by the integrity of our reporting teams."
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
