By AP/KWMU
St. Louis, MO. – A biological agent is detected at an air monitoring system near Busch Stadium in St. Louis.
But city officials say the agent is naturally occurring and there was no indication of terrorism or wrongdoing.
Particles of the biological agent tularemia (too-luh-REE'-mee-uh) also known as rabbit fever, were detected yesterday by a sensor near the ballpark.
The sensors were placed in several major cities after the September 11th, 2001, terrorist attacks.
City officials say testing in a state lab showed the amount of the agent was not significant.