The search for missing teenager Brittanee Drexel has led South Carolina authorities to a river and highway about 30 miles south of where she was last seen, but the efforts have yet to yield new information, police said.

Myrtle Beach Police Capt. David Knipes said officers are following a number of different tips in the dissappearance of the upstate New York 17-year-old, who left home on a spring break trip against her mother's wishes.

One of the tips led police to two different rivers and areas along U.S. 17, the main highway going south out of Myrtle Beach.

However, "there is nothing new to report on Ms. Drexel," Knipes said Saturday.

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Drexel, a junior on spring break from Gates-Chili High School in Rochester, N.Y., left the Bar Harbor Hotel at about 8 p.m. April 25 and went to visit a friend named Peter Broswick, who was with a group of male friends at the nearby Blue Water Resort. Police have released footage of the girl entering and leaving the lobby of the Blue Water about 8:30 p.m.

Detectives think Broswick may have been the last one to see the missing teen alive.

Broswick is also from Rochester and left Myrtle Beach to return home about 1 a.m. the night Drexel was last seen, according to News Channel 15's CarolinaLive.com.

Knipes told FOXNews.com he doesn't know the nature of the pair's relationship, and he wouldn't call Broswick a suspect.

Drexel's mother, Dawn Drexel, is worried because the teen suffers from depression, and she's losing hope that her daughter will be found safe. Brittanee Drexel may have been upset because her mother and stepfather are getting divorced.

Dawn Drexel said she didn't want her daughter to go to Myrtle Beach, but the girl had "her mind set" on it and went anyway. They continued to keep touch by phone — until the contact abruptly ended the night Brittannee disappeared.

Family and friends spent the past week canvassing popular beach clubs and hangouts in the resort town without any results.

Brittanee Drexel has blue eyes and shoulder-length brown hair with blond highlights. She's 5 feet tall, weighs about 100 pounds and was last seen wearing a multi-colored shirt, black shorts and flip-flops.

Those with any information are asked to call Myrtle Beach Police at (843) 918-1300, 1-800-CRIME-TV or 1-800-THE-LOST (843-5678).

Click here to visit HelpFindBrittanee.com.

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The Associated Press contributed to this report.