An auxiliary police officer was shot dead at the Mexico City home of Cardinal Norberto Rivera Carrera in what authorities described as an unsuccessful attempt at robbing the retired churchman.

The gunmen arrived at the cardinal's home in southern Mexico City on October 21 at around 3 p.m., Raymundo Collins, Mexico City public security secretary, told local media.

At least two men arrived in a delivery vehicle and pretended they were delivering an envelope. With the delivery as the pretext for ringing the doorbell, "they were able to force open" the door and enter "three meters" into the property, Collins said. Gunshots were exchanged with an auxiliary police officer providing security at the property.