Egyptian police on Thursday arrested a prominent opposition activist because he called for a referendum to decide whether President Abdel-Fattah Al-Sissi should stay in power.
Masoum Marzouk, a former diplomat, was arrested at his Cairo home.
His whereabouts remain unknown, said Mohammed Samy, the Head of the Opposition Al-Karama Party.
Sanny said two other activists were also arrested at their houses.
A source at the Interior Ministry, speaking on condition of anonymity, confirmed that Marzouk, and a second activist, a member of al-Karama Party, were arrested.
So far, there has been no official comment from the government on the reported arrests.
Earlier this month, Marzouk, a senior leader in the secular grouping the Popular Current, angered Al-Sissi’s loyalists with his call for an early presidential election.
The call was made months after al-Sissi won a second term in elections that only pitted him against a self-declared loyalist.
Hundreds of secular and Islamist opposition figures have been rounded up in Egypt since 2013 when the army, then led by Al-Sissi, deposed the country’s first democratically elected, but divisive, president, Mohammed Morsi, following mass street protests against his rule.