By Cristopher Ulloa, Veronica Calderon and Gerardo Lemos, CNN

(CNN) — All five workers trapped in a Chilean copper mine that partially collapsed this week have been found dead, authorities said on Sunday, as rescue workers completed their search through the debris.

The partial collapse of El Teniente, one of the world’s largest copper mines, had killed one worker on Thursday and left five others trapped under a significant amount of debris.

The deadly incident happened after a shaft collapsed following an earthquake, according to Codelco, the state-run firm that operates the mine.

The National Seismological Center of the University of Chile recorded a 4.3 magnitude earthquake in the area around the mine on Thursday. The quake and subsequent collapse left nine additional people injured,

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