Authorities have ramped up their efforts by air, sea and land to track down the 20-year-old University of Pittsburgh student who went missing six days ago while vacationing in the Dominican Republic resort town of Punta Cana.

New surveillance video has surfaced and a "person of interest" has been named in the case of Sudiksha Konanki, the Pitt student who went missing and disappeared while vacationing in the Dominican Republic.

A 'person of interest' has been named — but no charges have been filed — amid the search for missing college student Sudiksha Konanki, 20, who vanished during a spring break trip to the Dominican Republic.