The FBI and ATF are asking the Ankeny community for information related to the pipe bomb found near the Lakeside Center last week.
Police found a pipe bomb near the Center where a polling place for last week's special elections was located.
The FBI says they've been made aware of reports of sporadic, loud, explosive noises throughout last year.
You can call the FBI's office in Omaha at (402) 493-8688 or email omaha@fbi.gov with any tips.