The seven-story apartment building in Asan, South Chungcheong Province that suddenly tilted to one side last week collapsed completely during demolition.
According to the Asan municipal government, the demolition began at 8:20 a.m. on Sunday and was scheduled to take two days. But as two excavators were destroying the pillars in the third and fourth floors, the whole building toppled.
"There were seven or eight people working near the demolition site, but nobody was hurt and no damage was done to the surrounding buildings," according to an Asan city spokesman.
The building is one of a pair of twin buildings that were due to be completed by the end of this month. It suddenly tilted more than 20 degrees on May 12.
The police have obtained testimony from a staffer at the building site that the foundations had been poorly laid and are investigating whether foul play was involved.