Indonesian environmentalists blame rapid forest loss in Sumatra for severity of deadly floods

An aerial view of logs, which were swept away by a flash flood, stranded in Batang Toru, South Tapanuli, North Sumatra.

Authorities are probing the source of logs swept across Sumatra by floods. (Reuters)

In short:

Indonesia's government says it will summon eight companies over their suspected role in worsening the scale of floods and landslides in Sumatra.

But environmental groups say the government is hypocritical and partly to blame for the destruction, given its approval of mining and logging permits.

What's next?

Environmentalists want an official audit of land use in Sumatra and other Indonesian islands.