Police are responding to a report of an active shooter in Middleton, Wisconsin.
Authorities are asking everyone near the 1800 block of Deming Way to shelter in place.
Police have not released details on whether there have been any injuries.
WISC is reporting that about 50 police cars and the FBI are at the scene.
Four people have been taken to the hospital.
At least 50 cop cars in Middleton after reports of active shooter. pic.twitter.com/9ZEjtCF6Ke
— Keely Arthur (@news3keely) September 19, 2018