UN expert panel deems detention of Nigerien activist ‘arbitrary’ and demands immediate release
An independent United Nations working group has delivered a landmark decision, declaring the prolonged detention of Moussa Tiangari, a prominent Nigerien human rights defender, as arbitrary and in clear violation of international law. The UN Working Group on Arbitrary Detention (WGAD) issued its findings on June 23, 2026, following a complaint submitted by defenders of civil liberties and civil society organizations.
In reaction, human rights advocates are now urging the Nigerien authorities to act without delay by immediately releasing Mr. Tiangari and dropping all charges against him. The call comes as the activist completes over a year and a half in detention under conditions that contravene both national legislation and global human rights standards.
From international advocacy to secret detention
Moussa Tiangari, Secretary-General of Alternative Espaces Citoyens (AEC), a Niamey-based organization defending human rights, migrants’ rights, and democratic values, was forcibly taken from his home in Niamey on December 3, 2024. After 48 hours in undisclosed custody, concerns grew over possible torture and ill-treatment. On December 5, 2024, he was formally placed under arrest by the Central Service for Combating Terrorism and Transnational Organized Crime (SCLCT/CTO) and later charged on January 3, 2025, by the investigating judge at the Niamey High Court.
The timing of his arrest coincided with his return from Abuja, Nigeria, where he attended the board meeting of the Centre for Democracy and Development (CDD), a partner organization of AEC. Just days earlier, he had participated in the Itinerant Humanitarian conference in Abidjan, Côte d’Ivoire, organized by the International Committee of the Red Cross (ICRC) to mark the 75th anniversary of the Geneva Conventions.
A local journalist close to the government publicly accused him, in a December 4, 2024 article, of making statements harmful to Niger’s interests during the Abidjan conference. Meanwhile, on the same day, AEC had hosted a critical public forum on the controversial withdrawal of nationality by Niger’s military leadership, which included the city prosecutor and former high-ranking officials.
Legal experts highlight systematic rights violations
The WGAD’s decision, detailed in Opinion No. 4/2026, concludes that Moussa Tiangari’s detention lacks legal basis, violates his right to a fair trial, and stems from discriminatory motives tied to his legitimate exercise of freedom of expression, participation in public affairs, and peaceful assembly. The UN panel found that Niger’s actions breach multiple articles of the Universal Declaration of Human Rights and the International Covenant on Civil and Political Rights, including provisions on freedom of speech, due process, and protection from arbitrary arrest.
The activist faces charges of “apology for terrorism”, “attacks on state security”, “criminal association linked to a terrorist enterprise”, “attacks on national defense”, and “conspiracy against state authority” — all of which carry potential death sentences if he is convicted. Despite a May 15, 2026 ruling by the Niamey Appeals Court rejecting his request for provisional release, legal experts point out that national law previously capped pretrial detention in terrorism cases at 12 months — a limit that was retroactively extended to four years on June 26, 2026, effectively legalizing his continued detention.
A history of judicial harassment
This is not the first time Moussa Tiangari has faced arbitrary detention. He was held for 10 days in May 2015 on charges of “attacking national defense” and “demoralizing troops” after AEC published critical reports. In March 2018, he was arrested and detained for four months following peaceful protests against the 2018 finance law. Again, in March 2020, he was detained for a month and a half during an anti-corruption demonstration denouncing embezzlement in military procurement.
His case reflects a broader pattern since the July 27, 2023 military coup, during which civic space has shrunk dramatically. Human rights defenders, journalists, and dissenting voices increasingly face arbitrary arrests, enforced disappearances, and nationality revocations in Niger.
Urgent calls for justice and systemic reform
Human rights organizations are demanding that Niger immediately comply with the UN decision by releasing Moussa Tiangari unconditionally, dropping all charges, and ensuring his right to reparations. They also call for an independent investigation into his alleged torture and ill-treatment while in custody, and the identification and prosecution of those responsible.
The situation underscores the urgent need for Niger to end all forms of judicial harassment against human rights defenders and uphold its international obligations under the International Covenant on Civil and Political Rights and the African Charter on Human and Peoples’ Rights, both of which guarantee freedom of expression and protection from arbitrary detention.
