The passport of Joshua Riibes, an American linked to the disappearance of a University of Pittsburgh student, has been confiscated by Dominican authorities as part of an ongoing investigation, his attorneys told NBC News.

University of Pittsburgh student Sudiksha Konanki, 20, is still missing after her Spring Break trip to Punta Cana, Dominican Republic. The 20-year-old is an Indian national, but from Chantilly, Virginia – a suburb of Washington,

The authorities said they have interviewed a man they believe was the last person to see Sudiksha Konanki, 20, before she disappeared on a spring break trip to Punta Cana.