BANGKOK (AP) — While the exact cause of the deadly inferno that swept across a Hong Kong apartment complex remains unknown, questions have been raised about the role of the bamboo scaffolding that enveloped the buildings at the time of the fire.

The blaze, which has left at least 75 dead, has focused attention on the use of the ancient construction technique dating back over 1,000 years.

Bamboo poles lashed together using wire and other strong materials are often found at construction sites in Southeast Asia. Hong Kong is one of the few major cities where such scaffolding is a common sight.

Officials said Wednesday's fire started on the external scaffolding of a 32-story tower in the suburb of Tai Po, spread to the inside of the building and then to six other towers, likely aided by w

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