DETROIT (AP) — The Michigan Army National Guard is planning a series of emergency response exercises this week in Detroit.

The guard's 46th Military Police Command is working with local, regional, federal and Canadian authorities. They intend to rehearse actions responding to hypothetical chemical, biological, nuclear or radiological attacks.

The exercises aim to simulate such attacks in a dense, urban environment. Locations include steam tunnels, the Detroit River, an office park and a skyscraper.

The three-day event kicks off Tuesday.