Authorities in the Dominican Republic have confiscated the passport of the man who is the last person known to have been with missing University of Pittsburgh student Sudiksha Konanki, according to a source close to the investigation.

Joshua Steven Riibe, 24, has been identified as the man seen hugging and walking hand-in-hand with the 20-year-old student just hours before she vanished in the Dominican Republic.

The “person of interest” in the disappearance of missing Pitt student Sudiksha Konanki claims he saved them both from drowning before she vanished.

The search for a U.S. college student who went missing in the Dominican Republic intensified on Monday after a man questioned by authorities visited the beach where she was last seen and spoke with officials.

An American linked to the disappearance of a University of Pittsburgh student was spotted by NBC News with investigators and his attorney on a beach in Punta Cana early Sunday. Joshua Riibe was seen pointing toward the sea while a group of security officials kept people away from the area.