Police and journalists look at the body of a dead man hanging from a bridge in morelia march 17 .
警察和记者看一个死从3月17日在莫雷利亚悬桥男子的尸体。
Helicopters circled over the 18th-century cathedral in morelia . Convoys of soldiers wielding machine guns roamed its colonial streets , where some two-thirds of hotel bookings were cancelled .
