A retired New York City police officer claims he encountered a ghostly figure while sifting through the rubble from the Sept. 11, 2001, terrorist attacks.

Retired Lt. Frank Marra said he saw what appeared to be a black woman holding a tray of sandwiches while he searched for human remains in the rubble taken to the Fresh Kills landfill in Staten Island, reported the New York Post.

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The former officer said he saw the woman, who was dressed like a World War II-era Red Cross worker, several times.

She always appeared to be more than 50 yards away, Marra said, and would vanish as he strained his eyes for a better look.

“But you could clearly see it was a person,” he said.

The 48-year-old Marra said he buried the memory of the ghostly woman until 2013, when he conducted interviews for a book, “Hallowed Ground,” with others who had searched the landfill.

“You ever hear the stories about the old Red Cross worker trying to serve sandwiches and coffee out by the sifters?” said one retired crime-scene detective.

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The recollection triggered Marra’s own memory.

“It hit me like a ton of bricks — I had put that dormant – and it just reminded me that I remembered seeing her,” Marra said.

He said a psychic medium later explained to him that he and the other officers may have seen a “soul collector” who guides other spirits to the afterlife.

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Marra said other law enforcement officers told him about shadows and “large black masses” they saw while sifting through the rubble.

The remains of more than 1,600 people killed at the World Trade Center have been identified, he said, but the remains of 1,000 victims were never found.

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“How many had their ashes and remains uprooted and brought to this place?” Marra said. “Why isn’t their presence believable?”

Watch video of the search efforts posted online by WTC911demolition: