# Belize-Guatemala border sovereignty disputes > Live situation record from CLSTR: https://clstr.news/situations/belize-guatemala-border-sovereignty-disputes > Updated: 2026-09-30T19:09:24.000Z. Sources: 13. Developments: 4. Tensions between Belize and Guatemala have escalated following a series of maritime and aerial incidents near disputed territories. On September 10, 2026, the Belizean Ministry of Foreign Affairs issued a formal protest after approximately 18 Guatemalan military and civilian vessels reportedly obstructed Belizean nationals near Sarstoon Island. Belize characterized this deployment as a violation of its sovereignty and notified the Organization of American States. Following the maritime incident, Belizean authorities began investigating an unauthorized flight by a Guatemalan Air Force Pilatus PC-12 NG. The aircraft reportedly flew over the Lighthouse Reef Atoll and near Caye Caulker before its transponder signal was lost. By September 25, Belize confirmed it had gathered evidence, including GPS coordinates, and planned to issue a formal protest note. On September 27, the dispute reached the United Nations General Assembly. Belizean Prime Minister John Briceño accused Guatemala of violating sovereignty on September 24, alleging the aircraft intentionally disabled its transponder. Briceño stated such incursions are part of a continuing pattern of unlawful operations in the Sarstoon River area that could undermine the authority of the International Court of Justice (ICJ) ahead of scheduled hearings in February 2027. Guatemala has rejected these claims. On September 30, Guatemalan President Bernardo Aréval denied the allegations, stating, “this flight did not take place,” and suggested reports might have originated from an individual using a flight-tracking app. The Guatemalan government has offered the aircraft to the Organization of American States (OAS) for inspection of its flight records to resolve the dispute. ## Claims - Belize has gathered information, including GPS coordinates, regarding a reported entry of a Guatemalan military aircraft into its airspace. (single source) - The Belizean Ministry of Foreign Affairs intends to send a formal protest note to Guatemala demanding an explanation for the incident. (single source) - Guatemala's Ministry of National Defence stated its military activities comply with national and international law, without directly addressing the airspace entry. (single source) - Prime Minister John Briceño called for an end to the genocide and apartheid in Palestine during his UN General Assembly address. (single source) - Prime Minister Briceño renewed Belize's call for the lifting of the United States economic blockade against Cuba. (single source) - Briceño called for the urgent deployment of a gang suppression force in Haiti to support a political transition. (single source) ## Timeline ### 2026-09-30: Guatemala denies Belizean allegations of military airspace incursion Guatemala denies Belizean allegations of a military airspace incursion, offering flight records to the OAS for inspection, while also investigating military involvement in a deadly massacre in Zacapa. 8 sources. https://clstr.news/cluster/guatemala-denies-military-aircraft-flight-over-belizean-airspace ### 2026-09-27: Guatemala and Belize clash over alleged military aircraft incursion Guatemala has denied Belize’s allegations of a military aircraft incursion into its airspace, a dispute brought to the UN by Belizean Prime Minister John Briceño amid ongoing territorial tensions. 2 sources. https://clstr.news/cluster/guatemala-and-belize-clash-over-alleged-military-aircraft-incursion ### 2026-09-25: Belize investigates reported Guatemalan military airspace violation Belize is preparing a formal protest to Guatemala following reports of a military aircraft violating its airspace. Prime Minister Briceño also addressed the UN regarding crises in Haiti, Cuba, and Palestine. 3 sources. https://clstr.news/cluster/belize-investigates-unauthorized-guatemalan-military-aircraft-flight ### 2026-09-14: Belize protests Guatemalan vessel deployment near Sarstoon Island Belize has formally protested a September 10 incident where Guatemalan military and civilian vessels obstructed Belizean nationals near Sarstoon Island, citing violations of sovereignty. 3 sources. https://clstr.news/cluster/belize-protests-guatemalan-vessel-deployment-near-sarstoon-island --- Cite as: Belize-Guatemala border sovereignty disputes. CLSTR, https://clstr.news/situations/belize-guatemala-border-sovereignty-disputes