NEW YORK (CBSNewYork) — A commuter alert to be aware of for Monday and Tuesday.

The FDNY is conducting a hazmat exercise in Manhattan.

It’s happening from 8 a.m. until 6 p.m. on West 51st Street between 8th Avenue and Broadway. Officials say to expect road closures and members of the U.S. Army on the scene along with FDNY first responders.

It’s unclear why the busy Midtown stretch was selected for the exercise or what kind of tests will be conducted.