The worried family of a young bike enthusiast who has disappeared with his girlfriend while on a dream cycling trip through South America says there has been no activity on his bank account for over a month.
"How is my son traveling without getting any money?" Francine Fitzgerald asked. "How is my son eating?"
Fitzgerald's son Garrett Hand and his girlfriend Jamie Neal, both 25, embarked on their journey at the end of November, or early December.
As the couple cycled through the continent, they frequently posted updates and photos on Facebook, chronicling their journey. They posted photos of camping, the wildlife and the people they met along the way.
The last post was on Jan. 25 and said, "Finally found Kraft Mac 'n' cheese in South America! Stoked LOL." The couple have not been heard from since.
"They would post sometimes several times a day, pictures telling us where they were and then we all noticed that his postings stopped," Fitzgerald said on "Good Morning America" today.
Fitzgerald said she was hopeful that Hand's sister might be able to track him down with his bank account password and computer.
But when she logged on, she found that there has been no bank activity on the account since Jan. 25, the same day as the last Facebook post.
"Come home," Hand's sister Larkin McGowan pleaded on "GMA." "Your family needs you in California with us."
Jeff Jerge, the owner of the El Sobrante, Calif., bike shop where Neal works, said the couple had known each other for a while and began dating and planning their South American trip last summer. Jerge's wife Kim Jerge called the adventure a "dream trip" for the couple.
Neal has worked at The Pedaler for more than two years and Hand is a fisherman in Alaska.
"I'm beyond worried," Jerge told ABCNews.com. "I'm super concerned."
He said the couple originally wanted to bike from California to South America from Mexico, but he worried about the safety in Mexico and convinced them to fly to South America.
Jerge called Neal "very knowledgeable and an extreme cycle lover" and a talented mechanic.
"They had all the right gear," he said. "[The trip] was really well-planned and thought out in terms of the bicycling part."
The U.S. State Department said that according to their families, Hand and Neal had been traveling from Cusco to Lima, Peru, and were expected to arrive in Lima on Jan. 26.
According to the National Police of Peru, witnesses reported seeing Neal and Hand leaving Peru for Ecuador by boat in late January.
A State Department official confirmed to ABC News that the couple had not been heard from in almost a month.
"The U.S. Embassy in Lima is aware of the two U.S. citizens who apparently went missing while on a cycling trip in Peru," a State Department official said in a statement to ABC News.
"Consular officers from the U.S. Embassy in Lima are in contact with the families and Peruvian authorities, and are providing all appropriate consular assistance," the statement said. "The Peruvian authorities provided us all assurances that they will do everything possible to locate this couple. Embassy officers will continue to provide all appropriate consular assistance and to follow developments closely."
On Feb. 13, the U.S. Embassy in Peru issued a warning to Americans to beware of a kidnapping threat in the Cusco area from a criminal organization, but the State Department official did not confirm that the couple had been kidnapped, saying only that an investigation was under way. The Cusco area is near Machu Picchu, and is a popular destination for tourists.
Jerge's bike shop has so far raised $4,000 as a reward for information on the couple and have used others in the biking community to post flyers in South America.
"We don't know what to do," Jeff Jerge said. "What do you do when people are that far away and you're trying to help them?"