<span></span><header class="Article__Header"><div class="Article__Headline"><h1 class="Article__Headline__Title">Multiple casualties reported in 'active aggressor' situation in Louisville, Kentucky</h1><p class="Article__Headline__Desc">FBI and ATF agents are assisting.</p></div></header><div class=""><div><div class="FeaturedMedia"><div class="ResponsiveWrapper"><aside class="InlineElement InlineElement--content-width InlineElement--desktop InlineVideo FeaturedVideo" aria-label="Video"><div class="SingleVideo"><div class="MediaPlaceholder relative MediaPlaceholder--16x9 cursor-pointer" aria-hidden="false"><figure class="Image aspect-ratio--parent MediaPlaceholder__Image"><div class="Image__Wrapper aspect-ratio--child"><img aria-hidden="false" alt="" class="" data-mptype="image" src="https://s.abcnews.com/images/US/211022_vod_orig_examined_guns_FINAL0_hpMain_16x9_608.jpg" width="100%" height="auto"></div></figure><div class="MediaPlaceholder__Overlay absolute-fill flex flex-center-all"><div aria-hidden="true" class="MediaPlaceholder__Pill items-center absolute flex">11:16</div></div></div><div class="Caption__Wrapper"><div class="Caption"><p class="Caption__Title" aria-hidden="true"><span class="RichText">Gun violence: An American epidemic?</span></p><div class="Caption__TextWrapper"><div class="Caption__Text" aria-live="polite"><span class="Truncate Truncate--collapsed"><span><span class="RichText">Using research and statistics, experts examine America's history with guns, the real-life impacts of gun violence and what can be done going forward to mitigate the problem.</span></span></span></div></div><span aria-label="ABCNews.com" class="RichText Caption__Credit">ABCNews.com</span></div></div></div></aside></div></div></div></div><div class="ScrollSpy_container"><span></span></div><div class="Developments"><h1 class="Developments__Header"> </h1><ul class="Developments__List"></ul></div><hr><div><div class="LiveBlog--posts"></div></div><div class="Article__Footer Article__Footer--news"><div class="StoryDivider StoryDivider--logo"><hr><img alt="ABC News" class="Image Logo Logo__xxxl" data-mptype="image" src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100%" height="auto"><hr></div></div><div class="sponsored-headlines relative sl-wrapper w-100 taboola"></div>

Multiple casualties have been reported amid an "active aggressor" situation in Louisville, Kentucky, according to police.

Multiple casualties reported in 'active aggressor' situation in Louisville, Kentucky

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