Spray painted threats against St. Louis Police have the department on alert in north city where an officer killed a man Tuesday.

Police shot the man in his car after he allegedly resisted arrest. Graffiti found later on the wall of a nearby restaurant said an officer would be next.

Police Chief Dan Isom says the department is taking extra precautions in the district where the shooting occurred.

"I think that officers understand that there could be threats when things like this happen in the community," Isom said. "So, they're aware of it. They know how to take it in context. But also how to protect themselves."

Isom says he believes the threats are related to the death, but declined to speculate who was behind them.

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