A two-vehicle collision involving a limousine has left 20 dead in upstate New York, the New York State Police said on Sunday. Federal investigators were heading to the scene.

Local reports said the limousine was carrying a wedding party when it collided with another vehicle outside the Apple Barrel Country Store in Schoharie, New York, on Saturday afternoon.

Jessica Kirby, 36, the manager of the Apple Barrel Country Store, said multiple customers in the parking lot were killed when they were hit by the limousine as it sped down the hill on Route 30.

“All fatal,” she said in a phone interview. “That limo was coming down that hill probably over 60 mph.”

“I don’t want to describe the scene,” she added. “It’s not something I want to think about.”

She said she did not see the people inside the limousine and she could not describe the make or model of the other vehicle involved because it was “a mess.”

The New York State Police and the Schoharie County Sheriff’s Office responded to the accident, which occurred just before 2pm on Saturday at the intersection of State Route 30 and State Route 30A, according to the police.

The State Police said in a statement that “the names of the victims are not being released at this time as next of kin are being notified.”

The National Transportation Safety Board is sending a team to investigate, which a spokesman said would be on the ground by early Sunday afternoon.

Kirby said that Columbus Day weekend is the busiest weekend of the year for the store, and that it was packed. Most of her customers had arrived from New York City, New Jersey or Albany, she said.

“A lot of people from New York City come up and they do the country things, the apple picking and the sort,” she said.

On scene in Schoharie, scene of deadly limo accident which killed 20. You can see the muddy tracks of the vehicle and the impact spot in the woods beyond....

Kirby said she was inside the store when she heard the loud bang. She rushed out and immediately called 911.

“We’ve heard accidents before,” she said. “You know that sound when it happens.”