local sites. it was believe any threat had been eliminated in the area was safe. this latest incident, the investigators sealed off areas the couple had frequented before coming sick. like a baptist church center which held a family day the day before. they said there was no risk to the wide public, they would continue to assess the situation and urge caution. >> i should also warn the public to be careful as always of picking up any unknown object. such as needles, and syringes. you do not need to seek advice from a health professional unless you are experiencing symptoms. any individual who has been significantly exposed wouldn't by now i have been there. >> how and while this couple has been ill remains in mystery. there is no known reason. there is no information as to where they would have come into contact with the nerve agent.