Two top aides of Mexico City Mayor Clara Brugada were shot dead in a daytime ambush in the city center.
Ximena Guzmán, the mayor’s private secretary, and adviser José Muñoz were killed by gunmen on a motorbike while Guzmán was picking up Muñoz.
The attack has raised concerns about political violence in a city known for relative security.
Authorities have seized vehicles linked to the attack and are analyzing forensic evidence, but no official motive has been disclosed.
Security experts suggest the killings were likely ordered by organized crime, reflecting the ongoing risks political figures face in Mexico.