Mada Masr said Saturday that plainclothes security officers had arrested a senior Arabic language editor, Shady Zalat, 37, in a predawn raid on his home.
The news organization also said Saturday that an American editor who had been working in Cairo for it, Daniel O’Connell, 28, was recently stopped at Cairo’s international airport, deported and barred from re-entering the country.
Mada Masr said the officers who arrested Mr. Zalat had presented no warrant for his arrest and offered no explanation. His whereabouts was unknown.
The officers confiscated his laptop and his wife’s, and then they returned a few minutes later, “seemingly agitated, looking for his cellphone,” Mada Masr said.
“He has done nothing more than use words to report the news,” Mada Masr said.
Egypt had previously appeared to allow Mada Masr a unique degree of freedom, perhaps because the authorities had successfully made its contents difficult to view in Egypt, or because of its singular reputation in Western capitals. For more than two years, the publication has been blocked by government censors from easy internet access within Egypt.
Nearly two years ago, for example, Mada Masr obtained documents revealing how private companies controlled by the Egyptian intelligence services had worked behind the scenes to acquire control of most of Egypt’s privately owned and ostensibly independent media outlets.
The increased pressure on Made Masr may be part of a broader crackdown on dissent since September.
Mr. el-Sisi’s government has never tolerated political opposition or public demonstrations. But in September, a series of online videos by a former contractor accusing the president and his circle of corruption set off a rare outburst of limited street protests.