More reason for mourning

This is a strange and tragic story out of Mexico City:

MEXICO CITY (AP) - Three people were killed by lightning at a graveyard on the outskirts of Mexico City while attending the funeral of a 62-year-old man, authorities reported Thursday.

The accident occurred late Wednesday when rain forced participants at funeral gathering to take shelter under a tree in the graveyard of San Francisco Acuautla, a town on the eastern outskirts of the capital.

A lightning bolt hit the tree and then apparently struck six people, all of whom collapsed on the ground.

One man, a gravedigger, died instantly, local media reported. Two relatives died en route to a local hospital.

That's the tragic part. Lightning hitting a tree isn't all that unusual, and if you happen to be taking shelter underneath ...

The strange part is this:

The remaining mourners continued with the burial ceremony after the accident.

What is the protocol here?

We don't have a clue, but it would seem difficult to stick around a rainy cemetery after such an incident, even if the casket has not yet been lowered.