Louisville, Kentucky shooting sees multiple casualties, police say

Police in Louisville, Kentucky, have confirmed "multiple casualties" after a shooting in the city.

The Louisville Metro Police Department said on Twitter it was responding to an "active aggressor". Members of the public have been asked to stay away from a part of East Main.

Video from the area appears to show heavily armed police cordoning off a commercial property in the area.

Police are expected to hold a news conference shortly.

News footage from the scene shows a heavy police presence, with damaged glass and discarded medical equipment at one location.

The incident happened in Louisville's downtown area, close to the Louisville Slugger Field baseball stadium and several blocks from the Kentucky International Convention Centre and Muhammad Ali Centre.