The latest arrests involved "two terrorist cells", and the majority of those held had links to the gunmen "through logistical support, the transport of weapons or hiding those involved", a statement said.
Last week, Interior Minister Najem Gharsalli said 23 suspects, including a woman, had been arrested for involvement in the attack, adding they were all Tunisians
The Bardo attack was carried out by two Tunisian assailants who were themselves gunned down. It was claimed by the Islamic State jihadist group.
But officials have said the mastermind was Algerian jihadist Lokmane Abou Sakhr, a leader of the Al-Qaeda-linked Okba Ibn Nafaa Brigade, the main Tunisian armed group active along the border with Algeria.
Abou Sakhr was shot dead by Tunisian security forces on Saturday night.
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Last week, Interior Minister Najem Gharsalli said 23 suspects, including a woman, had been arrested for involvement in the attack, adding they were all Tunisians
The Bardo attack was carried out by two Tunisian assailants who were themselves gunned down. It was claimed by the Islamic State jihadist group.
But officials have said the mastermind was Algerian jihadist Lokmane Abou Sakhr, a leader of the Al-Qaeda-linked Okba Ibn Nafaa Brigade, the main Tunisian armed group active along the border with Algeria.
Abou Sakhr was shot dead by Tunisian security forces on Saturday night.
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