India, March 12 -- Police are investigating whether a bus fire in a town west of the Swiss capital that killed at least six people was started deliberately.

Police spokesperson Frederic Papaux of Fribourg canton, or region, said an unspecified "voluntary act" could have caused the fire Tuesday evening in the town of Kerzers, about 25 km west of Bern.

Five people were also injured in the fire, which for locals, echoed a New Year's Eve fire in the Swiss ski resort of Crans-Montana that killed 41 young people.

Christa Bielmann, representing the Fribourg police, told Swiss broadcaster SRF: "There is information circulating that a person poured flammable liquid over themselves on the bus and that this caused the fire.

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