CBS News has learned they may be ruled suicides.
Tala Farea and Rotana Farea are seen in these undated photos released by the New York Police Department.
As indicated by the New York Times, reports suggest that the sisters were reported missing previous year, and when they were found by the police, they were placed in a shelter after asking for protection.
The chief of detectives did not say it has been determined the sisters did in fact kill themselves, but said they had discussed it in the past.
Detectives have conducted various interviews in Fairfax, Virginia, where Tala and Rotana Farea had previously been living with family since 2015.More news: Donald Trump, Xi Jinping eye G20 talks after ‘very good’ phone call
Detectives are now reviewing hotel and restaurant records, video, electronic statements and eyewitness accounts to determine what the sisters were doing between September 1 and October 24, when their bodies were found in the Hudson, a source said. "There is still work to do".
U.S. officials said yesterday they believed that Rotana Farea, 22, and Tala Farea, 16, were alive when they entered the water, bound by duct tape and facing each other. Despite the distance, the man believed they were together as their heads were both lowered in their hands as they loudly prayed.
There were no obvious signs of trauma to their bodies, police have said. She said Tala was visiting Rotana in NY but that she'd lost touch with both about a week before the bodies washed ashore.
But so far, investigators have uncovered no credible evidence that Rotana Farea, 22, and Tala Farea, 16, were victims of foul play, Chief of Detectives Dermot Shea told reporters at a press conference Friday afternoon.
The pair, who moved to the U.S. state of Virginia from Saudi Arabia in 2015, had been missing since August.More news: Danish officials allege to have thwarted Iranian assassination plot
As indicated by the Arab News, an English paper in Saudi Arabia, their mom revealed Tala, the younger sister, was reported missing months ago but called off the search once she found out that Tala was staying with Rotana in New York City.
The younger sister, Tala, had been reported missing on August 24, according to the National Center for Missing and Exploited Children.
A spokesperson for the institute called the news of her death "tragic", and said the university was cooperating with police.
It's unclear when the women arrived in NY and where they were staying, the sources said.
The consulate added that it had already appointed a lawyer to follow the case in order "to avoid inaccurate reporting".More news: US restricts exports to China's Fujian Jinhua