A wall collapsed at a construction site on Parklands Fifth Avenue in Parklands on Thursday instantly killing one and leaving several others with serious injuries.

According to an eyewitness report, the wall of an adjacent building to the construction site budged and collapsed, causing a construction worker some injuries.

Upon realizing that their colleague was in danger, fellow constructions workers who were setting up concrete piers of the building under construction rushed to save him.

That is when hell broke loose as the other part of the wall caved in, almost burying them all under debris.

The construction workers sustained seriously and were rushed to Saint Mary’s Hospital.

Details of the illegality of the building emerged as the National Construction Authority stepped in and closed the construction site on Thursday afternoon.

The authority claimed the building was built illegally, without leaving two meters between its walls and the adjacent building as required.