https://cdnph.upi.com/ph/st/th/3521776882834/2026/i/17768835178431/v1.5/Mexico-seeks-answers-from-US-over-agents-in-Chihuahua-operation.jpg" /> President Claudia Sheinbaum said Mexico sent a diplomatic note to the U.S. Embassy seeking to know why U.S. agents participated in a field operation.