A team of international and Tanzanian lawyers has lodged a petition at the International Criminal Court (ICC) seeking the indictment of President Samia Suluhu Hassan and several senior security chiefs, alleging their responsibility in what they describe as systematic killings during recent presidential election protests.

The application—filed on behalf of families of victims, survivors and civil society representatives—presents one of the most significant legal challenges to a sitting Tanzanian president in the country’s history. It accuses the state of orchestrating, permitting or failing to halt violent crackdowns that reportedly left thousands dead or unaccounted for during weeks of unrest that followed the bitterly contested vote.

While the ICC has not yet indicated whether it will proceed with the matter, the filing marks a dramatic escalation in international scrutiny over the events that plunged the nation into turmoil. For Tanzania—long viewed as a stable democracy in East Africa—the allegations, if pursued, could reshape both domestic politics and its global standing.

Legal analysts say the petition signals a growing willingness by victims’ groups to seek accountability beyond national borders, especially where they believe local mechanisms have failed or been compromised.

“This is no longer a domestic political dispute—it has entered the realm of international criminal law,” said a regional human rights expert familiar with the filing. “The implications for Tanzania’s leadership, its security apparatus, and the region at large are profound.”

According to the petitioners, state agents and allied militias allegedly used lethal force—including live ammunition—against demonstrators in multiple regions. The document cites patterns of alleged disappearances, mass detentions, torture and the obstruction of medical assistance to the wounded.

These incidents, the lawyers argue, fit the legal definition of crimes against humanity: widespread or systematic attacks against a civilian population.

They also claim that local institutions—including the judiciary and oversight bodies—have either been unable or unwilling to investigate the killings, making the ICC the only viable avenue for justice.

Documents reviewed by The Times confirm that the application has been submitted to ICC Deputy Prosecutor Nazhat Shameem Khan, the Fijian judge and international legal scholar who has served at the court since 2022. Her office will now assess whether the allegations fall within the ICC’s jurisdiction and whether there is a reasonable basis to open a preliminary examination.

This process could take months or even years, depending on the complexity of the claims and the court’s capacity. If accepted, Tanzania could find itself under an ICC spotlight similar to past cases involving Kenya, Sudan and Côte d’Ivoire.

The Tanzanian government has yet to issue a formal response. In previous statements, officials have insisted that security forces acted lawfully to prevent chaos and protect property during what they described as violent and destabilising protests.

Independent verification of casualty figures remains difficult due to restricted access to certain regions, limitations on media reporting, and what civil society groups describe as intimidation of witnesses.

Regional human rights organisations say they have tracked hundreds of confirmed deaths but believe the real figure is far higher.

For President Samia—who has sought to project an image of reform and openness since taking office—the ICC petition poses a significant challenge. Her administration has invested heavily in diplomatic outreach, economic reforms and rebuilding international partnerships.

However, critics argue that these efforts ring hollow without a credible and transparent response to the allegations of election-related violence.

“Reform cannot coexist with impunity,” said a Tanzanian political analyst. “This case will reveal whether the government is prepared to confront the past or bury it.”

International observers, including foreign missions and rights organisations, have begun calling for independent investigations. Several Western governments are said to be monitoring the ICC process closely, viewing it as a barometer of Tanzania’s commitment to democratic norms.

If the ICC proceeds, Tanzania could face diplomatic pressure, potential sanctions and isolation similar to situations seen in other nations facing international justice processes.

Whether or not the case advances, the filing has already altered the political landscape. Victims’ families, long unheard, now have their voices elevated onto a global platform. The government faces rising calls—both domestically and abroad—for transparency and accountability.

For the ICC, this case could test the court’s willingness to intervene in politically charged situations involving sitting heads of state. For Tanzania, it could shape the nation’s democratic trajectory for years to come.