Amtrak now says its rail service between New York and Philadelphia will probably be suspended through Monday, while tracks and other equipment are repaired in the area where a derailment Tuesday night killed eight people.
The railroad had earlier said limited service would resume Monday.
The last of the wrecked railcars were removed Friday and taken on flatbed trucks to an Amtrak facility in Delaware for further examination.
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Mourners gathered in suburban New York for the funeral Friday of one of the eight victims, Naval Academy Midshipman Justin Zemser.
The 20-year-old sophomore was traveling from the academy in Annapolis, Maryland, to his home in New York City when he was killed