There is “no known terrorist threat” to the City of Chicago following news of Osama bin Laden’s death, but all Chicago police officers will be in uniform Monday and other city workers have been told to “remain vigilant,” according to city emergency officials.

In a press release Monday morning, the Chicago Office of Emergency Management and Communications said city departments are taking precautions to protect residents and tourists, as news of bin Laden’s killing by U.S. forces Sunday has raised questions about possible retaliatory attacks against America.

In a show of force, all Chicago Police Department personnel have been instructed to wear uniforms Monday.

“Some of the units have been - the heightened alert has been heightened a little more when it comes down to that,” interim Chicago Police Superintendent Terry Hillard told reporters Monday. “(We’ve) taken the mood - a couple specialized units and there are some critical assets and we’ll just wait and see.”

A spokesman with the city’s Office of Emergency Management and Communications says personnel have been monitoring video surveillance cameras around the city, particularly on roads, bridges, the CTA and certain buildings.

The city is urging residents to call 911 if they notice any suspicious activity.