Screengrab from X video A Mexican Navy patrol vessel collided with a docked cargo ferry at the port of Isla Mujeres on Thursday after a suspected mechanical failure during a routine manoeuvre, authorities said. No injuries were reported, but both vessels were damaged and an investigation is underway. The vessel, the coastal patrol ship ARM Uxmal (PC-335), was approaching the pier in Mexico’s Fifth Naval Region when it lost control and struck the Ro-Ro cargo ferry Ultracarga III, which was already docked at the time. According to the Mexican Navy (SEMAR), the incident occurred during a manoeuvring approach and may have been caused by a failure in the vessel’s clutch system. The Navy described the impact as an “unintentional contact” and said technical teams are examining both vessels in coordination with port authorities. Videos shared on social media showed the patrol ship moving toward the ferry without slowing down before the collision. People at the terminal can be heard shouting warnings moments before impact. Local reports, including from newspaper Reforma, suggested a possible malfunction in the vessel’s computerized systems, including a microcontroller issue that may have prevented steering and braking responses. The Navy has not confirmed these details. [English] 21/06/2026 “Mexican Navy Accident” June 18, 2026. A Mexican Navy ‘ARM Uxmal’ (P-335), Tenochtitlan-class coastal patrol vessel colliding with the “Ultracarga III” cargo ferry at the Isla Mujeres port. No casualties reported. Suspected caused by a mechanical failure. https://t.co/M6PvV8Fddb pic.twitter.com/qyW4uImdP9 — Elizabeth Vstx (@EVostox) June 20, 2026 SEMAR said maritime safety procedures were activated immediately after the accident and that technical evaluations are ongoing to determine the cause and extent of damage. No injuries were reported among crew members or port personnel. The ferry operator Ultramar and the naval authorities have not yet released