(revises death toll, updates throughout)

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Six people were killed and dozens injured Friday when several cars of a passenger train ran off the tracks south of Paris, French President François Hollande said.

He provided the casualty figures after meeting at the accident scene with first responders.

Twenty-two of the injured are in serious condition, the president said, acknowledging to reporters that it will take time to identify the bodies of the dead.

Declining to speculate about the causes of the accident, Hollande said witness accounts indicated "there was a collision" and he vowed that the three investigations now under way - by the judiciary, the SNCF railway and the Transport Ministry - will consider every possibility.

The accident took place at 5:08 p.m., shortly after the train left Paris' Austerlitz station bound for Limoges with around 370 passengers aboard.

Several cars ran off the rails at the Bretigny-sur-Orge station, where the train was not scheduled to stop.

SNCF called a halt to all rail activity in the vicinity of Bretigny-sur-Orge, an important hub for commuter service in the capital region.

Service was also suspended at the Austerlitz station as many Parisians were headed out of town for the Bastille Day weekend.

EFE