(ABC NEWS)- Four sisters and their four family members who were among 20 people killed in a limousine crash in upstate New York last week will all be laid to rest Saturday.
The group was on their way to a birthday party with several other friends on Oct. 6 when their stretch limousine blew through a stop sign and slammed into an unoccupied, parked SUV in Schoharie, New York, about 43 miles west of Albany. All of the limo's 18 occupants, including the driver, were killed as well as two pedestrians who were standing nearby, authorities said.
Both state and federal authorities are investigating the crash, which is the deadliest transportation accident in the United States since August 2009, according to Robert Sumwalt, chairman of the National Transportation Safety Board.
A combined funeral service will be held Saturday afternoon at St. Stanislaus Church in Amsterdam for eight of the victims inside the limo: Allison King, 31, of Ballston Spa, New York; sister Abigail Jackson, 34, and her husband Adam Jackson, 34, of Amsterdam, New York; sister Mary Dyson, 33, and her husband Robert Dyson, 34, of Watertown, New York; sister Amy Steenburg, 29, and her husband Axel Steenburg, 29, of Amsterdam, New York, as well as his brother, Richard Steenburg, 34, of Johnstown, New York.
"They were special girls," Valerie Abeling, aunt of the four sisters, told ABC's Albany affiliate WTEN-TV. "I loved them dearly. My brother said he lost most of his family."
The group was celebrating Amy Steenburg's 30th birthday, family members told ABC News. She had just married her husband in June.
A lawyer for the limo company, Prestige Limousine, told ABC News earlier this week that the vehicle had failed the safety inspection over minor problems.