After ricin was found on a letter sent to the president, local U.S. congressmen and women are keeping a close eye on the mail that comes to their offices.

Chester Glover, a district congressional caseworker with U.S. representative Corrine Brown said that they received an email yesterday from the house sergeant at arms advising them to be on the lookout for suspicious packages. Glover said they received one last week.

"And when we shook it it rattled, like it had something in it and when we opened it we found out it had rice in it," Glover said. They determined the package was harmless and it was discarded.

But they still are suspicious of packages with no return address or items with misspelled words. Also items that may have an unknown powder or suspicious substance or letters with excessive postage are given a second look.

"It doesn't put us on edge but it keeps us always to stay alert because you just never can tell," Glover said. "We're always just very careful of opening up things"

Sen. Bill Nelson is also speaking out about the letters sent to the president.

"We've temporarily stopped mail delivery to Senate and other government buildings, and our state offices have special mail handling procedures in place," Nelson said. "Thankfully, the safeguards authorities put in place after 9-11 have worked and protected our people. "