Mail carriers have been temporarily pulled from routes in eastern Iowa and western Illinois where someone put at least eight pipe bombs in rural mailboxes, and Lieutenant David Garrison with Iowa Department of Public Safety warns residents in the affected area to be watchful. He says you should exercise caution going to the mailbox, opening the box or handling any package in it. If you find anything suspicious, call your local law-enforcement agency and stay away. Seven people were injured, none seriously, by the pipe bombs. Three bombs were discovered and detonated by experts. Among the injured: four letter carriers, an elderly couple from Tipton, and an unidentified person from Anamosa.