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. He added that the family had not received any direct communication since the ransom note was delivered, which requested money for her return. The investigation has attracted significant media coverage, with reports detailing the emotional responses from Savannah and her siblings.

At a briefing, FBI Special Agent Heith Janke confirmed that authorities were reviewing the ransom note but provided few specifics, highlighting the need for the family to hear from their mother’s captors. Despite the gravity of the situation, Sheriff Chris Nanos reassured the public that they are working under the assumption that Nancy is still alive. Investigations continue as authorities urged anyone with information to contact them immediately.