TAINAN, Taiwan (AP) — Prosecutors investigating the deadly collapse of an apartment building in southern Taiwan have approved the detention of three construction company executives on charges of professional negligence resulting in death.

The Tainan District Prosecutors Office said in a statement Wednesday that Lin Ming-hui and architects Chang Kui-an and Cheng Chin-kui were suspected of having overseen shoddy construction of the 17-story Weiguan Golden Dragon building, which tumbled on to its side following an earthquake Saturday.

The statement said the three were detained to prevent collusion or other acts that could disrupt the investigation.

The death toll in the 6.4 magnitude quake stands at 41, with all but two of the deaths coming in the building collapse. More than 100 people are believed to still be trapped in the debris.