Authorities in the Dominican Republic have confiscated the passport of the man who is the last person known to have been with missing University of Pittsburgh student Sudiksha Konanki, according to a source close to the investigation.

Officials seized the passport of Joshua Riibe, an American college senior, and they say they are examining possible inconsistencies in his story.

The investigation into the disappearance of 20-year-old Sudiksha Konanki continues in the Dominican Republic. The family of a Minnesota college student who authorities claim was the last person who saw missing 20-year-old Sudiska Konanki in the Dominican Republic say their son has been "detained under irregular conditions."