The brother of US news presenter Savannah Guthrie has renewed his family's plea for proof that their mother is still alive after she disappeared last weekend.
As the first deadline from an alleged ransom letter passed, Camron Guthrie said in a video posted to Instagram that the family had not heard anything about their missing mother, Nancy Guthrie.
The 84-year-old is believed to have been abducted from her home in Tucson, Arizona in the middle of the night. Police launched a massive hunt, with officials offering a reward of $50,000 (£36,000) for information that leads to an arrest.
"We have to know that you have our mum," Camron said in the latest video message. "We want to talk to you."
"We haven't heard anything directly," he said in the video, posted on Thursday just after 17:00 local time in Arizona (00:00 GMT).
