The Foreign Office has issued a travel advisory, urging British citizens to avoid Mexico due to escalating violence following the death of a notorious cartel boss, Nemesio Oseguera Cervante, known as El Mencho. This update comes as a response to the widespread cartel violence, including in popular tourist spots, which has prompted the Foreign, Commonwealth & Development Office (FCDO) to release a map of affected areas. The no-go zones include the border town of Tijuana and the Chihuahua region. Anyone with travel plans to Mexico should refer to the FCDO's guidance, which is regularly updated, especially during rapidly changing situations. The advisory is part of a comprehensive list of 13 countries where the FCDO warns against travel due to various security concerns. These countries include Afghanistan, Belarus, Burkina Faso, Haiti, Iran, Mali, Niger, North Korea, Russia, South Sudan, Syria, Venezuela, and Yemen. Each country faces unique challenges, such as volatile security situations, terrorist threats, and political instability, making travel potentially dangerous. The FCDO advises against all travel to these destinations, emphasizing the importance of checking the latest advice before planning any international trips.