The United Nations Working Group on Arbitrary Detention has delivered a decisive ruling: the prolonged imprisonment of Nigerien human rights advocate Moussa Tiangari constitutes a clear violation of international law. The decision, issued on March 23, 2026 and made public on June 23, 2026, demands his immediate and unconditional release, yet authorities in Niamey continue to defy this mandate.
From professional conference to detention: a timeline of persecution
On December 3, 2024, Tiangari was forcibly abducted from his home in Niamey following his return from a critical meeting in Abuja, where he served on the board of the Centre for Democracy and Development (CDD) – a partner organization of Alternative Espaces Citoyens (AEC), the human rights group he leads. Just days prior, he had participated in the 7th edition of the “Wandering Humanitarian” conference in Abidjan, organized by the International Committee of the Red Cross to commemorate the 75th anniversary of the Geneva Conventions.
Upon his return, a state-aligned journalist published an article on December 4, 2024, falsely accusing Tiangari of undermining Niger’s interests during these international engagements. This smear campaign preceded his disappearance. After 48 hours in secret detention – a period that saw credible allegations of torture and ill-treatment – he was transferred to the Central Service for Counter-Terrorism and Organized Crime (SCLCT/CTO) in Niamey. On January 3, 2025, the investigating judge of the High Court of Niamey formally charged him under several draconian provisions of the Nigerien Penal Code.
Grounds for detention deemed legally baseless
The UN Working Group’s opinion, designated as Opinion No. 4/2026, categorically states that Tiangari‘s detention is arbitrary because it lacks any legal foundation, violates his right to a fair trial, and stems from discriminatory motives tied to his legitimate human rights advocacy. Specifically, the detention infringes upon his fundamental freedoms: expression on matters of public concern, participation in public affairs, peaceful assembly, and association. The Working Group found Niger in breach of multiple articles from the Universal Declaration of Human Rights and the International Covenant on Civil and Political Rights, including provisions guaranteeing freedom of expression, due process, and protection from arbitrary detention.
A pattern of judicial harassment and retroactive legal manipulation
Despite the UN ruling, Tiangari remains imprisoned in the high-security Filingué prison, facing charges that carry the death penalty if convicted: “apology for terrorism,” “attacks on state security,” “criminal association linked to a terrorist enterprise,” “attacks on national defense,” and “conspiracy against state authority in collusion with enemy powers.” These accusations stem from his documented human rights work, including his vocal opposition to the military regime’s controversial decision to revoke citizenship from certain activists during a conference held on November 28, 2024.
On May 15, 2026, the Appeals Court in Niamey rejected his request for provisional release, despite a legal provision (Article 615 of Order No. 2026-10) that limits pretrial detention in terrorism cases to a maximum of 12 months – renewable once. Tiangari has now been held for over 18 months. Worse still, on June 26, 2026, authorities retroactively amended the law to extend maximum pretrial detention in criminal cases from 12 to 48 months – a clear attempt to justify his continued incarceration.
This is not the first time Tiangari has been targeted. He has endured a decade of judicial harassment:
- May 2015: Arbitrarily detained for 10 days under charges of “attacks on national defense” and “statements likely to demoralize troops” after AEC published critical reports.
- March 2018: Detained for four months following peaceful protests against the 2018 finance law; charged with “organizing and participating in an unauthorized protest” and “complicity in violence and property destruction.”
- March 2020: Held for six weeks after leading an anti-corruption rally exposing embezzlement in military procurement.
Systemic erosion of civic space under military rule
The persecution of Moussa Tiangari is emblematic of a broader crackdown on civil society in Niger since the July 27, 2023 coup. The military-led regime has systematically restricted fundamental freedoms – expression, assembly, association – through arbitrary arrests, enforced disappearances, and citizenship revocations targeting human rights defenders and dissenting voices. The UN Working Group’s intervention underscores the regime’s disregard for international obligations to uphold human rights and the rule of law.
Urgent demands for justice and accountability
Civil society organizations, including the Observatory for the Protection of Human Rights Defenders, urge the Nigerien authorities to:
- Comply immediately with the UN Working Group’s opinion by releasing Moussa Tiangari without delay or conditions.
- Drop all charges against him and provide full reparations for his unlawful detention.
- Initiate an independent investigation into his enforced disappearance, torture allegations, and the circumstances of his arrest.
- Hold accountable those responsible for these grave violations.
- Cease all forms of judicial and extrajudicial harassment against Tiangari and other human rights defenders in Niger.
- Uphold international human rights standards, particularly Article 19 of the International Covenant on Civil and Political Rights and Article 9 of the African Charter on Human and Peoples’ Rights, to which Niger is a signatory.
