JAKARTA, Dec 4 (Reuters) – Indonesia will revoke mining permits if companies are found to have violated rules on flood-ravaged Sumatra island, the energy minister said as questions intensified about the role of deforestation in worsening the deadly disaster.

Cyclone-induced floods and landslides have left about 800 dead and 564 missing across the three provinces of West Sumatra, North Sumatra and Aceh, according to government data.

The cyclone systems have also killed almost 200 people in Malaysia and Thailand, and followed months of deadly weather in Southeast Asia, including deadly typhoons in the Philippines and Vietnam.

In Indonesia, landslides have cut power and blocked roads, hampering rescuers and aid getting to isolated villages.

On Thursday, Environment Minister Hanif Faisol N

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