Mexico City Shaken: Top Official's Secretary Assassinated

Mexico City reels from assassination of top government official's secretary. The shocking murder of the chief of staff to Claudia Sheinbaum, head of Mexico City's government, has sent ripples of fear and uncertainty through the city. The attack, described by ADN40 journalist [Name of journalist, if available], as a 'direct crime against a very powerful person,' occurred while the city government was presenting its security report. 'This is a moment to maintain calm,' said the ADN40 reporter in a video statement, 'and to demand clear explanations from authorities.' The incident has left many residents feeling vulnerable, with the city's hard-earned sense of security now in question. Authorities have launched an investigation, and the public anxiously awaits answers.