A boy abducted from a California park more than 70 years ago has been found safe and sound as a retiree and reunited with his surviving relatives after his niece found him across the country through her own DNA research, police said Monday.

Luis Albino was only six years old when he was “abducted from the Jefferson Park Playground in Oakland by an unknown woman on February 2, 1951, who took him out of the state and eventually to the East Coast,” a police statement said.

The immediate search for Albino was unsuccessful and the case remained unsolved for seven decades.

But then, earlier this year, Albino's niece went to Oakland police again and told officers “that the results of her online DNA test matched those of a person believed to be her uncle,” police said.

FBI agents working for Oakland police interviewed Albino at his East Coast home and took a DNA sample. His genetic material matched that of two surviving siblings in California, proving he was the boy abducted in 1951, police said.

The FBI, California Department of Justice and Oakland Police arranged and paid for Albino's reunification with his long-lost family on June 24.

“It was an emotional moment for everyone involved and a family reunion that had been hoped for for over 70 years,” police said.

The Oakland police statement did not say who investigators said abducted Albino from the park 70 years ago or who raised him.

“We can only release limited information at this time as the case is still under investigation,” an Oakland police spokesman said Tuesday.

For his relatives from California, it was a bittersweet reunion.

The albino's 92-year-old mother died in 2005 without ever learning the fate of her kidnapped son, the Bay Area News Group reported.

Albino was able to meet and spend time with his brother Roger this summer. He was with him in the park the day he was kidnapped in 1951. Roger died last month.

“I think he died happy,” said Alida Alequin, 63, the niece who reported her 22% DNA match to albino to police. “He was at peace knowing his brother was found. I was just so happy that I could do this for him and bring him closure and peace.”