WASHINGTON (7News) — The search for Sudiksha Konanki, a 20-year-old college student from Loudoun County who vanished during a spring break trip in the Dominican Republic, has taken a new turn.

Dominican authorities have confiscated the passport of 24-year-old Joshua Riibe, a person of interest, who is believed to be the last person to see Konanki before her disappearance, according to ABC News.

Riibe was questioned extensively over the weekend, sources told ABC News. Local authorities have maintained for over a week that Riibe is not a suspect and has not been charged with any crime.

According to ABC News, the man told police they were swimming and got caught in a wave, and then he fell asleep on the beach. Now sources told ABC News, that authorities are examining possible contradictions to Riibe's story.

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In a transcript obtained by ABC News, Riibe told prosecutors that he and Konanki met the night before she vanished. He stated the two of them were partying and drinking with friends before heading to the beach around 4 a.m. He allegedly said the two were in the ocean kissing when they were slammed by a large wave and dragged out by a strong current. He also alleges that they both struggled to breathe and he tried to save her.

"I was holding her under my arm and swimming. It was hard. I was a pool lifeguard, not the ocean," Riibe said in a transcript obtained by ABC News." When I finally touched the sand, I put her in front of me. Then she got up to go get her stuff since the ocean had moved us."

"She was not out of the water since it was up to her knee. She was walking at an angle in the water," Riibe added, according to the transcript obtained by ABC News. " I asked her if she was OK. I didn't hear a response because I began to vomit with all the water I had swallowed."

"After vomiting I looked around and I didn't see anyone," Riibe said in the transcript.

Riibe told authorities he passed out on the beach and awoke thinking Konanki had gone back inside. Hotel cameras captured him returning to his room in the morning.

As of Monday, Konanki has been missing for 11 days, and Riibe is set to speak with police again.

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Konanki was last seen exactly one week ago on the morning of March 6 at the Riu República Hotel in Punta Cana. Police said she disappeared at a beach by the hotel before dawn, as she and other guests had headed outside amid a power outage at the resort.

Interpol has issued a Yellow Notice --- a global police alert for a missing person, which is often used in cases of unexplained disappearances.

The investigation continues as authorities work to uncover more details about Konanki's disappearance.