Troy churches are now on alert because police are worried after two separate incidents of suspicious activity.
Police are warning all of the churches in Troy to be careful, because they still don't know what they're dealing with.
The warning comes after suspicious activity twice in the past few weeks, including strangers who appear to actually be casing the buildings.
At faith Lutheran Church of Troy on Dequindre, security worker William Flint is keeping close watch on a high tech surveillance system.
Police are warning churches to specifically be on the lookout for strangers asking a lot of questions.
Also people should keep watch for vehicles spending lots of time in parking lots without reason.
On Jan. 26th at 6:30 pm, Troy Police will hold an informational meeting to talk more about their investigation.
