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.

Surveillance video appears to show the final moments before Sudiksha Konanki, a 20-year-old University of Pittsburgh student, vanished last week. She was walking with three women and two men towards the beach at a resort in the Dominican Republic nearly a week ago.