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 showing what are believed to be the last known images of Sudiksha Konanki, the Pitt student who went missing and disappeared while vacationing in the Dominican Republic.

Police in the Dominican Republic say the FBI has joined the search for a 20-year-old University of Pittsburgh student who went missing nearly a week ago while on spring break.