UPDATE 9:42p ET: According to the Associated Press, the family of Rachel Jacobs confirmed that she was one of the seven people killed in the derailment of Amtrak Train 188. 

Her family said that her death was "an unthinkable tragedy" and that they "cannot imagine life without her," the Associated Press reported. 

Read the original story below:

Some passengers reportedly remain unaccounted for this morning after the deadly Amtrak train crash near Philadelphia. 

Tuesday night's crash left at least six people dead and more than 140 injured, including six critically. 

Authorities have not said what caused the train to derail.

(Read the latest details at FoxNews.com.)

Rescue crews are on the scene this morning, combing through the twisted metal of the wrecked train cars, searching for survivors. 

One of those said to be missing is Rachel Jacobs (pictured above), the CEO of a company in Philadelphia, according to her friend.

Emily Foote called in to "Fox and Friends" this morning in an effort to find Jacobs, who is the mother of a two-year-old.

Foote said Jacobs was "definitely" on the train, but she doesn't think Amtrak has a record of it yet because of the type of ticket Jacobs was using. 

Foote said she has spoken with Jacobs' husband and they want to alert as many people as possible.

"We're at a loss for where she could be," said Foote. 

Foote explained that she and Jacobs' husband have been in contact with local hospitals and checked in with the Red Cross, which is on the scene helping to reunite passengers and family members. 

According to ABC 6 in Philadelphia, Jacobs is the CEO of ApprenNet and lives in New York.

Watch the interview above.


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