PUNTA CANA, Dominican Republic >> 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.

Sudiksha Konanki, a 20-year-old student at the University of Pittsburgh and an Indian citizen, vanished before dawn on March 6 in the resort town of Punta Cana.

Authorities were scouring waters in case she had drowned.

Minnesota student Joshua Riibe has not been named as a suspect but is believed to be the last person to see her. On Sunday, he and his attorney met with officials on the beach.

— The Associated Press