Police activity was reported on the Northwestern University campus in Evanston Friday afternoon, the school announced.

Northwestern University sent out an alert on Twitter at 6:43 p.m. Friday that police activity was present on their Evanston campus near the Mudd Library, at 2233 Tech Drive.

The alert advised to "take immediate precautionary measures and await further direction."

Emergency - Police activity Evanston campus - 2233 Tech Drive - Mudd Library. Take immediate precautionary measures and await further direction. — Northwestern (@NorthwesternU) September 5, 2025

It was not immediately known what the police were responding to.

This story will be updated as more information becomes available.

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