May 20, 2010 7:46 PM by Matt Stafford
A park official says a white powder found in a balloon near the Liberty Bell in Philadelphia was flour.
The balloon was found Thursday inside the building that houses the Liberty Bell. The Liberty Bell Center and part of a street next to it were evacuated as a precaution.
Independence National Historical Park spokeswoman Jane Cowley says multiple tests determined the powder was flour. She says the area will reopen soon.
A guard found the balloon inside the visitors' entrance to the Liberty Bell Center, which is in downtown Philadelphia near office buildings, a federal courthouse and Independence Hall.