Local and federal authorities are responding to a reported active shooting situation at a building on the 1800 block of Deming Way in Middleton, Wisconsin, a small city on the western shore of Lake Mendota and about 6 miles from Madison. Local news reporters said that as many as 50 police cars responded to the shooting. Middleton Police are leading the investigation, while ATF agents from the Madison office are also responding. According to the local CBS affiliate, the Dane County dispatch center said shots have been fired at the offices of Esker Software. Reports of the shooting arrived at around 10:25 am local time. Multiple ambulances flying down University Ave in the past 20 min, headed to Middleton. I've seen at least one with sirens heading back toward the hospital now https://twitter.com/hashtag/WKOW?src=hash&ref_src=twsrc%5Etfw!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+"://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); https://t.co/3cRggukpKf — Jennifer Kliese (@jenniferkliese) https://twitter.com/jenniferkliese/status/1042443725690032128?ref_src=twsrc%5Etfw!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+"://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); WATCH: What we know from near the scene of a reported active shooting incident in Middleton https://t.co/foY5cBDtyn https://twitter.com/hashtag/news3?src=hash&ref_src=twsrc%5Etfw!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+"://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); pic.twitter.com/d8QGk3PXIf — WISCTV News 3 (@WISCTV_News3) https://twitter.com/WISCTV_News3/status/1042444683430060033?ref_src=twsrc%5Etfw!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+"://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); Scene at John Q Hammons Drive in Middleton. https://twitter.com/nbc15_madison?ref_src=twsrc%5Etfw!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+"://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); has multiple crews on scene working to gather more information. pic.twitter.com/yTUIOKkfKC — Gabriella Rusk (@GabriellaRusk) https://twitter.com/GabriellaRusk/status/1042444176716169216?ref_src=twsrc%5Etfw!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+"://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); According to RT, the Greenway Station Mall in the area is also on lock down due to incident.. Schools in the area are also reportedly on lockdown. One local reporter said that several ambulances were loaded up and driven away from the scene. The status of the shooter is not yet known. This is an ongoing story. Check back for updates...