<p class="speakable">A 17-vehicle crash in <a href="https://www.foxnews.com/category/us/us-regions/southwest/texas" rel="noreferrer noopener" target="_blank">Austin, Texas,</a> left five people dead, including a child and an infant, first responders say. </p><p class="speakable">The massive pileup involving a semi-truck unfolded late Thursday night along I-35 in the North Austin area, according to Austin-Travis County EMS. </p><p>The agency said several people were "pinned in their vehicles" following the wreck. </p><p>"5 patients (3 adults, 1 child, 1 infant) have been pronounced deceased on scene," Austin-Travis County EMS wrote on X. </p><p><a href="https://www.foxnews.com/us/plane-crashes-retirement-communitys-parking-lot-pennsylvania-officials" rel="noreferrer noopener" target="_blank"><strong>PLANE CRASHES IN RETIREMENT COMMUNITY’S PARKING LOT IN PENNSYLVANIA: OFFICIALS</strong></a><strong> </strong></p><p>The cause of the crash was not immediately clear. </p><p>Of the 12 people who were injured, three of them are children, officials said. </p><p>The portion of I-35 southbound where the crash happened appeared to be closed early Friday morning. </p><p><a href="https://www.foxnews.com/travel/truck-driver-interferes-highway-shootout-wins-goodyear-highway-hero-award" rel="noreferrer noopener" target="_blank"><strong>TRUCK DRIVER INTERVENES IN HIGHWAY SHOOTOUT, WINS GOODYEAR HIGHWAY HERO AWARD</strong></a><strong> </strong></p><p>"All lanes of N IH 35 SB are shut down and will be for several hours. Please avoid the area, expect delays, and find alternate routes," the Austin Police Department wrote on X. </p><p>Austin-Travis County EMS Captain Christa Stedman told CBS Austin that "This incident was incredibly chaotic and it was spread out over about a 10th of a mile.  </p><p><a href="https://www.foxnews.com/apps-products?pid=AppArticleLink" rel="noreferrer noopener" target="_blank"><strong>CLICK HERE TO GET THE FOX NEWS APP</strong></a><strong> </strong></p><p>"So without the collaboration of our partners, we would not have been able to manage the scene as well as we did," she added. </p>