LOS ANGELES, United States: The family of the kidnapped mother of a top US TV news anchor made a new plea for information from her captors on Thursday, after investigators said they believed the 84-year-old was still alive.

Nancy Guthrie, mother of NBC News “Today” co-host Savannah Guthrie, is believed to have been kidnapped from her home in Tucson, Arizona, some time on Saturday night or Sunday morning, sparking a massive hunt in a case that has gripped America.

“Whoever is out there holding our mother, we want to hear from you,” the missing woman’s son, Camron Guthrie, said in a video posted on Instagram.

“We haven’t heard anything directly. We need you to reach out and we need a way to communicate with you so we can move forward. But first we have to know that you have our mom.”

Savannah Guthrie had tearfully pleaded with kidnappers to share proof of life earlier this week.