LAKEWOOD -- UPDATE: The headquarters have been reopened.
No word on the cause of the odor.
The communication center has resumed taking calls.
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Colorado State Patrol officials said its headquarters in Lakewood was evacuated at 8 a.m.
Several employees complained of headaches and nausea after many noticed a strange odor in the building.
West Metro Fire Department are investigating the source of the odor.
So far, none of the evacuated employees appear to have sustained signifcant injuries or symptoms.
911 calls should not be affected.