TERRE HAUTE, Ind. -- Authorities have evacuated and searched three Barack Obama campaign offices in Indiana in response to a bomb threat was made while people voted in the state's primary.

The bomb threats were made Tuesday in a call to a Terre Haute television station. Lewis Robinson of the Secret Service's Indianapolis office says the caller made threats against Obama offices in Terre Haute, Vincennes and Evansville.

Obama spokesman Kevin Griffis says there was little disruption to the campaign. Workers left the offices and continued working by making cell phone calls.

The reports mirror the circumstances of Obama's office in Vincennes being vandalized early Monday morning. In that incident, a male caller also reported the vandalism to a station in Terre Haute.