On Sunday, November 16, 2025, Tanzanian authorities arrested Charles Onkuri Ongeta, a 30-year-old dual citizen of the United States and Kenya and a serving U.S. Army sergeant, at the Sirari border crossing between Tanzania and Kenya. Ongeta was apprehended after allegedly attempting to enter Tanzania from Kenya in a Toyota Land Cruiser carrying four CS M68 hand grenades.
The Tarime-Rorya Regional Police Command confirmed the arrest, stating that Ongeta was stopped during routine midday checks. Tanzanian police emphasized that, under national firearms legislation, the explosives could not be legally imported even with a permit. A police statement noted: “Evidence is still being gathered alongside ongoing questioning regarding these allegations, so that appropriate legal action may be taken against him.”
The M68 grenades are lethal steel-bodied fragmentation hand grenades used by the U.S. military, designed to cause maximum casualties. The motive for Ongeta’s journey and the intended purpose of the explosives remain unclear, forming the core of ongoing investigations.
This high-profile arrest occurs amid political volatility in Tanzania, following the disputed general election on October 29, 2025. President Samia Suluhu Hassan, who was declared the winner, has blamed foreign nationals for instigating post-election unrest, heightening scrutiny of foreigners, particularly Kenyans, in the country.
The incident has sparked serious diplomatic and security concerns across East Africa, with authorities and security experts warning of potential fallout. As of November 17, 2025, neither the Kenyan Ministry of Foreign Affairs, the U.S. Embassy in Dar es Salaam, nor the U.S. Department of Defense have released official statements regarding the arrest.
Regional security analysts stress that possession of military-grade explosives across borders is a major offense, with potential implications for bilateral relations and regional stability.
Tanzanian authorities continue to investigate while reinforcing border security to prevent similar incidents.
