Police said they're looking into the death of a passenger Friday morning.
Metro-North said the investigation is in the Cos Cob section of Greenwich.
Police confirmed that the passenger was struck by a train. The train was headed to New Haven from Grand Central Terminal in New York City.
Officials said a woman dropped her wallet onto the tracks and went to retrieve it and was struck.
Police continue to investigate how it happened. They only identified the woman as being a 28-year-old Connecticut resident.
The train was an express traveling about 45 miles per hour at the time.
Passengers on that train had been transferred to another train and saw a 30 to 40 minute delay.
Delays of 15 to 20 minutes were reported on the New Haven line and at the New Canaan and Waterbury branches.
Metro-North advised riders to listen for announcements.
Delay information can be found on the rail service's website here.
An autopsy will be conducted. Police said it will be a few days before they announce the cause of the accident.
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