The mother of the young Saudi sisters whose duct-taped bodies mysteriously washed up along the Hudson River told cops she learned a day before the grim discovery that the girls had applied for asylum in the United States, police sources said.

Rotana and Tala Farea’s mom told detectives that she received a phone call on Oct. 23 from the country’s Washington, DC, embassy stating that their family’s residency in the US was in jeopardy because the sisters had applied for immigration asylum, sources said.

The next day, the bodies of Rotana, 23, and Tala, 16, were found beached off the shore of Riverside Park near West 68th Street, bound together at the waist by duct tape, according to officials.

Officials confirmed Tuesday they were looking into the sisters’ immigration status, including whether they had, in fact, filed for asylum — but the new angle shed little light on a case still shrouded in mystery.

Investigators are still piecing together how and why the sisters made their way from their adopted home in Fairfax, Va., nearly 250 miles northeast to Manhattan, as well as whether it was foul play or suicide that preceded the macabre Oct. 24 discovery of their bodies.

Cops initially suspected that the sisters followed through on a bizarre suicide pact, binding themselves and leaping from the George Washington Bridge, over 100 blocks north, then drifting downriver.

But authorities walked back that theory on Tuesday, reasoning that both the duct tape and the sisters’ bodies would’ve sustained more damage in a fall from that height.

The Office of Chief Medical Examiner found no immediately obvious signs of trauma on either body, both of which were both fully clothed and suffered relatively little decomposition.

Their mom also told detectives that she hadn’t seen her daughters since December 2017, when she reported them missing to cops in Fairfax, sources said.

Virginia police found them soon after, but rather than return home they went to live in a local shelter, with cops refusing to disclose its location to her, according to sources.

The nature of the shelter or the reason for their stay wasn’t immediately clear.

Tala was reported missing again by the National Center for Missing and Exploited Children in August, but the English-language ArabNews.com, citing unnamed family members, reported that the mother called off the search when it was discovered the teen was visiting her older sister at an unspecified college in New York.

Attempts to reach the sisters’ parents Tuesday were unsuccessful.

The Saudi Consulate in New York said in a statement that the DC embassy had been in touch with the family and that they’d retained an attorney to monitor any developments.

Additional reporting by Aaron Feis and Stephanie Pagones