Authorities in the Dominican Republic are turning up the heat on the Iowa man who was the last person to see University of Pittsburgh student Sudiksha Konanki before she went missing — grilling him into the early morning hours on Sunday.

A man has been named a person of interest in the case of missing University of Pittsburgh student Sudiksha Konanki.The Loudoun County Sheriff's Office in Virginia confirmed to Pittsburgh's Action News 4 Joshua Riibe is now considered a person of interest,

Joshua Riibe, the last person seen with missing University of Pittsburgh student Sudiksha Konanki, had his passport confiscated by Dominican Republic authorities as part of an ongoing investigation into her disappearance.

The Loudoun County Sheriff's Office in Virginia said U.S. investigators interviewed a person of interest at length.

The “person of interest” in the disappearance of missing Pitt student Sudiksha Konanki claims he saved them both from drowning before she vanished.

The man who last saw missing University of Pittsburgh student Sudiksha Konanki told investigators he thought she was OK and had "taken her things and left."

A man who might've been the last person to see a missing University of Pittsburgh student in the Dominican Republic said he rescued her from drowning — only for her to vanish a short time later, according to a transcript of an interview he gave local authorities.

A person of interest has been identified in the disappearance of Sudiksha Konanki, a University of Pittsburgh student who vanished while on spring break in the Dominican Republic last week.