Suspicious packages were sent to election officials in at least six states on Monday, but there were no reports that any of the packages contained hazardous material.

Election officials in Iowa and at least four other states were the target Monday of what appears to be a coordinated series of threats or acts of intimidation involving suspicious parcels. State officials evacuated the Lucas State Office Building in Des Moines on Monday after a suspicious parcel was discovered at the Secretary of State’s

In Oklahoma, authorities said the State Election Board received a suspicious envelope in the mail containing a multi-page document and a white.