It’s not clear how many people may have been trapped in their homes when part of a mountainside cascaded down Masara village Tuesday night in the far-flung town of Maco in Davao de Oro province, provincial government spokesman Edward Macapili said, but 11 residents were injured.

Getting people and product to Hong Kong is a lot more expensive than, say, transporting wares a few miles away to Mexico City’s annual mega-fair Zona Maco, where Proyectos Monclova is a regular presence.

“MACo was very 50-50 on who was masked indoors and who wasn’t,” Elrich said at a news conference, adding that he was disappointed that conference organizers did not mandate that attendees wear masks.

But after seeing media reports Tuesday night, including at least one that said two staff members who tested positive were at the conference, MACo Executive Director Michael Sanderson said the group decided to alert attendees about positive cases.

In an email sent to all attendees late Tuesday, MACo warned that “several individuals” had tested positive and directed people to the guidelines from the Centers for Disease Control and Prevention regarding what to do after possible exposure.