New York City Office of Chief Medical Examiners (OCME) reports that the remains of a man killed in the Sept. 11, 2001 terrorist attack have been identified.

John Ballantine Niven, of Oyster Bay, New York, became the 1,650th victim to be identified from the 9/11 attacks, the medical examiner’s office announced on Thursday.

“While the pain from the enormous losses on September 11th never leaves us, the possibility of new identifications can offer solace to the families of victims,” New York City Mayor Eric Adams said. “I’m grateful for the ongoing work from the Office of Chief Medical Examiner that honors the memory of John Ballantine Niven and all those we lost.”

The 9/11 victim’s identification was made possible through continuous DNA testing techniques on remains recovered in 2001, OCME said. Chief Medical Examiner Dr. Jason Graham, in a statement, reiterated his office’s commitment to identifying 9/11 victims.

“Our solemn promise to find answers for families using the latest advances in science stands as strong today as in the immediate days after the World Trade Center attacks,” said Chief Medical Examiner Dr. Jason Graham. “This new identification attests to our agency’s unwavering commitment and the determination of our scientists.”

According to OCME, 1,103 victims, or 40% of the total deceased, have yet to be identified. Ahead of the anniversary’s attack last year, the OCME protected two additional identifications, respecting the families’ wishes to keep their names private, Daily Caller reports.

“We will forever remember our heroes who perished on 9/11, and we appreciate the continuous efforts of forensic experts to help identify victims,” Oyster Bay Supervisor Joseph Saladino said in a separate statement. “We’re hopeful that this amazing advance in technology helps bring peace to Mr. Niven’s family and allows him to eternally rest in peace.”

According to reports, Niven was a 44-year-old executive at Aon Risk Services, an insurance firm. An obituary for Niven was published in the New York Times on Sept. 23, 2011. He was survived by his wife Ellen and son John Jr.

As DNA testing has evolved, so has the effort to connect more than 21,900 bits of remains to individual victims. In some cases, scientists have returned to the same bone fragment 10 or more times, hoping the new technology will provide answers.

The 9/11 attacks killed nearly 3,000 people in New York, at the Pentagon, and near Shanksville, Pennsylvania.