The father of Sudiksha Konanki, a 20-year-old American student who went missing while vacationing in Punta Cana, has urged authorities to expand their investigation and consider the possibility of kidnapping.

She was last seen on surveillance video on a beach with several people around 4 a.m. Thursday. Five women and a man left the beach about two hours later, but Konanki was not among them, CNN reported. NBC News reported it was believed that she stayed behind with a man, who was seen leaving the beach just before 10 a.m. He was alone.

Konanki and the man were seen swimming together at the beach near Riu Republica Resort sometime before she was last spotted there going for a walk just after 4 a.m. on March 6.

Punta Cana.- Dominican authorities are intensifying their search for Sudiksha Konanki Chowdary, a 20-year-old tourist from India residing in the U.S., who went missing in Punta Cana. The National Police (PN) and Public Ministry (MP) are leading the investigation,

Sudiksha Konanki, a 20-year-old college student from Virginia, has been missing from a spring break trip in the Dominican Republic since last Thursday, authorities said.

Sudiksha Konanki, a college student at the University of Pittsburgh, was first reported missing on Thursday, while traveling with a group.

A 20-year-old University of Pittsburgh student went missing while on spring break in Punta Cana. Get updates on her case here.