Malaysian state power company Tenaga Nasional has put out a spot tender for coal, calling for prompt delivery from as far afield as Australia, South Africa and Russia.

The utility, which finance group CGS CIMB estimates takes 60% of its coal from Indonesia, is one of a growing number of regular buyers of Indonesian coal seeking alternative supply sources as they grow fed up with delays by Indonesian authorities in allowing loaded ships to depart the country's clogged coaling anchorages and terminals.