BOSTON, July 23: The FBI said on Friday it was investigating 'unconfirmed information' about a possible attack on media vehicles during the Democratic National Convention which begins on Monday in Boston.

"The FBI has received unconfirmed information that a domestic group is planning to disrupt the Democratic National Convention by attacking media vehicles with explosives or incendiary devices," the Federal Bureau of Investigation's Boston field office said in a statement.

The FBI said members of the Boston Joint Terrorism Task Force were investigating, and that it would provide more details if there was 'any credible information'.

A spokeswoman for the Boston FBI told Reuters that the bureau had notified media organizations of the probe because they were potential targets. Boston police declined immediate comment.

US officials have said security would be unprecedented for the DNC, the first major US political convention since the Sept 11, 2001, attacks on New York and Washington.

Organizers say some 15,000 media representatives are expected in Boston to cover the convention, where Senator John Kerry is expected to be nominated as the Democratic presidential candidate. -Reuters