Criminality was the likely cause of the collapse of seven pylons, which supported 132kV powerlines, on the N4 in Pretoria on Sunday night, according to City of Tshwane Mayor Cilliers Brink. “There are now clear indications that at least three of the pylons had been vandalised. So, indeed, there are strong indications that criminality played a role here,” he said in an update on Monday.