<div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Law enforcement investigating the disappearance of US </span><em><span>Today</span></em><span> show host Savannah Guthrie's mother sealed off a road near </span><a href="https://www.9news.com.au/world/chilling-images-from-nancy-guthries-porch-could-hold-valuable-clues-about-the-masked-suspect/4951f593-e7c7-47f1-82b3-91a5f6c4bef9" rel="" target="" title="Nancy Guthrie"><span>Nancy Guthrie</span></a><span>'s home in </span><a href="https://www.9news.com.au/usa" rel="" target="" title="Arizona "><span>Arizona</span></a><span> late on Friday night (local time).</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>A parade of sheriff’s and FBI vehicles, including forensics vehicles, passed through the roadblock that was set up about 3.2 kilometres from the house.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The Pima County Sheriff’s Department said the activity was part of the Guthrie investigation but declined to detail specifics.</span></div></div><div><div id="adspot-mobile-medium"></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><strong><span>READ MORE:</span></strong><span> </span><a href="https://www.9news.com.au/national/sydney-north-ryde-85-year-old-man-chris-baghsarian-kidnapped-by-mistake/6149610e-4b4f-4cd5-8147-d6b5fddb4a96"><strong><span>Man, 85, kidnapped by mistake from Sydney home</span></strong></a><span></span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Guthrie, 84, was reported missing on February 1.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Authorities say her blood was found on the front porch of her Tucson-area home.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Purported ransom notes were sent to news outlets, but two deadlines for paying have passed.</span></div></div><div><div class="OUTBRAIN" data-reactroot="" data-src="//www.9news.com.au/world/nancy-guthrie-missing-tv-mother-kidnapping-arizona-law-enforcement-block-road-near-home/938601a1-6474-4f04-952b-70850830ae1a" data-widget-id="AR_5"></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><strong><span>READ MORE: </span></strong><a href="https://www.9news.com.au/national/camden-crash-emergency-services-called-to-twocar-crash-on-the-old-hume-highway-at-camden-bypass/72a82da6-fdee-4d22-99c9-fbdaef482bae" rel="" target="" title=""><strong><span>Two dead in Sydney crash allegedly involving stolen car</span></strong></a></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Authorities have expressed concerns Guthrie’s </span><a href="https://www.9news.com.au/health" rel="" target="" title="health "><span>health</span></a><span> because she needs daily medication.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>She is said to have a pacemaker and has dealt with high blood pressure and heart issues, according to sheriff’s dispatcher audio on broadcastify.com.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Investigators have studied surveillance video, sorted through thousands of tips and submitted DNA and other evidence for laboratory analysis.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><strong><span>READ MORE:</span></strong><span> </span><a href="https://www.9news.com.au/world/chilling-images-from-nancy-guthries-porch-could-hold-valuable-clues-about-the-masked-suspect/4951f593-e7c7-47f1-82b3-91a5f6c4bef9"><strong><span>Chilling images could hold valuable clues on kidnapped mother</span></strong></a><span></span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><strong><span>READ MORE: </span></strong><a href="https://www.9news.com.au/national/museum-egyptian-artefact-stolen-brisbane/628a8d1a-3dfe-4b88-9e6c-f37d374b4766" rel="" target="" title="'Priceless' Egyptian artifacts stolen in Queensland museum heist"><strong><span>'Priceless' Egyptian artifacts stolen in Queensland museum heist</span></strong></a><strong></strong></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The FBI said it has collected more than 13,000 tips since February 1, the day Guthrie was reported missing.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The sheriff’s department, meanwhile, said it has taken at least 18,000 calls.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>On Tuesday, authorities released footage showing an armed, masked person at Guthrie’s doorstep on the night she was abducted.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The videos — less than a combined minute in length — gave investigators and the public their first glimpse of who was outside Guthrie’s home in the foothills outside Tucson.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Experts say the video could contain a mountain of clues.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><strong><em><span>NEVER MISS A STORY:</span></em></strong><span> </span><em><span>Get your breaking news and exclusive stories first by following us across all platforms.</span></em></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><ul><li><strong><em><span>Download the 9NEWS App here 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