( CNN ) -- At least six people were killed and 22 injured in a train derailment on Friday just south of Paris , French President Francois Hollande said . The announcement by Hollande revised the death toll down from seven dead in Bretigny-sur-Orge . Hollande arrived at the scene while rescue operations were under way . It was still unknown what caused the derailment of the regional train that left the Paris Austerlitz station Friday afternoon , said Guillaume Pepy , president of SNCF , the French national railway company . SNCF characterized it as an accident . Carrying about 370 people , the train was passing through the Bretigny-sur-Orge station . It did not have a scheduled stop there , Pepy said . It was bound for the city of Limoges , Valls said . The last four cars went off the track , the railway company said . One was lying on the track , it said . A photo airing on BFMTV showed part of the train lying on the station 's platform . Hollande , who said he 's traveled on the route before , announced three investigations -- a judiciary inquiry , an internal inquiry within SNCF and an inquiry that will be handled by the country 's transport ministry . Firefighters were on the scene as rescue operations continued into the evening , Pepy added . Experts began their investigation at the scene . `` The first thought we all have is one of solidarity toward the victims and their families , and we feel a strong emotion because rail accidents are upsetting to the whole public , '' Pepy said , becoming emotional as he spoke . Earlier Friday , French police said that at least eight people had been killed , according to CNN affiliate BFMTV . CNN 's Pierre Meilhan contributed to this report .
NEW : At least six people were killed in the accident , France 's president says . Last two cars of train stopped , the railway company says . France 's national railways company says the derailment was an accident . The cause of the accident is being investigated , it says .