The spokesman of Tunisia's Ennahda party has been detained, the party said on Wednesday.
Abdelfattah Taghouti was detained by a national guard unit on Tuesday evening, Ennahda said, demanding his immediate release.
Deutsche Presse-Agentur (DPA) contacted the party but it had no information on the reasons behind the arrest.
Authorities are investigating several leaders from Ennahda, which is the largest party opposing President Kais Saied, over accusations of conspiracy against the state, financial corruption, sending Tunisians to Syria to fight, and terrorism.
The party says that these charges are fabricated and politically motivated.
Among the detainees are Ennahda Secretary-General Ali Laarayedh, who is a former prime minister and minister of the interior, former Minister of Justice Noureddine Bhiri, and former Minister of Agriculture, Mohamed Ben Salem.
Ennahda’s former MP al-Habib al-Loz and Abdul Hamid Al-Jalasi, who resigned from the party, were also arrested.
Investigations also include Rached Ghannouchi, head of the party, who is still free.
In its statement, Ennahda condemned a “campaign of arbitrary arrests aimed at diverting attention from the failings of the regime.”
“Public opinion knows the failure and impotence of the authorities after 20 months of monopolizing power, a period in which our country has sunk further into economic collapse, social misery, and international isolation,” the party stressed.
It further denounced the campaign to silence those who oppose Saied’s policies.