By Diego Oré and Aida Pelaez-Fernandez MEXICO CITY (Reuters) -Two top aides of Mexico City Mayor Clara Brugada were shot dead after being ambushed by gunmen on a motorbike in a daytime attack in the city center on Tuesday.

The personal secretary and an adviser to Mexico City’s mayor were shot dead Tuesday, authorities said, in the worst attack against public officials in the capital in recent years.