The last person authorities believe may have seen Sudiksha Konanki, the 20-year-old University of Pittsburgh student who vanished while on a spring break trip in the Dominican Republic, was back on the beach — this time with investigators.

Joshua Riibe was the last person seen with University of Pittsburgh student Sudiksha Konanki before she went missing while in the Dominican Republic. His attorney said his passport has been confiscated by Dominican authorities and he is confined to a hotel.

New information has revealed that other people were on the beach when US college student Sudiksha Konanki went missing in the Dominican Republic, law enforcement officials assisting with the investigation told CNN,

A 20-year-old University of Pittsburgh student went missing while on spring break in Punta Cana. Get updates on her case here.

Joshua Riibe is believed to be the last person to have seen University of Pittsburgh student Sudiksha Konanki before she went missing nearly 10 days ago.

University of Pittsburgh student Sudiksha Konanki went missing in the tourist town of Punta Cana while on spring break with friends.

An American linked to the disappearance of a University of Pittsburgh student was spotted by NBC News with investigators, his father 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.

St. Cloud State senior Joshua Riibe has remained in his hotel room under police surveillance when not questioned at the police station, his parents said.