Konanki traveled to Punta Cana with friends for spring break.

The 20-year-old Konanki, a legal permanent U.S. resident and an Indian citizen, vanished early Thursday while she and a group of students were on a spring break trip to a resort in Punta Cana, according to the Loudoun County, Virginia, Sheriff's office.

Konanki and one of her traveling companions were Loudoun County residents, the sheriff's office said.

After going to a nightclub on Wednesday night, Konanki and a group of people went to the beach about 4 a.m. local time on Thursday, the sources said. The other women traveling with Konanki went back to their hotel about 5:55 a.m. and were captured on security camera returning to their rooms, the sources noted.

A man stayed behind with Konanki on the beach, according to a Dominican Republic investigative police report. The man, whose name was not released, told police that he and Konanki went for a swim and got caught by a big wave, the police report said.

The man, according to sources, told police that when he got back to the beach he threw up and went to sleep on a beach bed. When he woke up, Konanki was nowhere to be seen, the sources said.

Security video showed the man coming back to his hotel room at 9:55 a.m., according to the sources.

Right now, the investigation is being treated as an accident, the chief said.

Law enforcement authorities are increasing the perimeter of the search area of beaches and water in the ongoing operation to find Konanki, according to the chief.

The Public Ministry was first contacted by the U.S. embassy in the Dominican Republic on Friday, the Ministry said.

Officials said Konanki's friends who were with her around the time of her disappearance were questioned by police and have not been charged with crimes.