Hong Kong (CNN) — Hong Kong’s leader said he will ensure “justice is served” over the inferno that killed more than 150 people last week , as city officials point the finger of blame at construction companies for allegedly using substandard mesh netting to wrap scaffolding on the buildings.

The number of people arrested over the fire that tore through seven high-rise apartment blocks and burned for almost two days, has risen to 14 and more arrests may follow, authorities said, with the city’s chief executive John Lee vowing to “uncover the truth” and “pursue justice” for the dead.

CNN’s Samra Zulfaqar contributed reporting

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