KUALA LUMPUR (AFP) - - A six-hour power failure across Malaysia's Sarawak state on Borneo island caused chaos and plunged more than two million people into darkness, reports said on Sunday.

The electricity outage hit on Saturday evening, darkening cities and towns across the state and causing massive traffic jams as signals failed.

"The state government wants to find out the source of the massive blackout. We need to know exactly," Deputy Chief Minister George Chan told The Star newspaper, describing the blackout as unprecedented in the state.

A Sarawak Electricity Supply Corporation official told the daily that it believed the cause of the outage was a fault along the main power grid between the towns of Sibu and Bintulu.

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