Hong Kong police say unsafe scaffolding and foam may have spread fire that killed at least 83

Three construction employees arrested as firefighters battle to reach trapped people, with more than 250 still missingHong Kong fire – latest updatesHow the fire unfolded – visual guideHong Kong police have alleged unsafe scaffolding and foam materials used during maintenance work may have been behind the rapid spread of a devastating fire at a group of residential tower blocks that has killed at least 83 people and left more than 250 missing.Firefighters were still battling to reach