But he said the police were investigating another explosion at the JFK Library in South Boston.

FORBES: This post was last updated on Monday, April 15 at 5 PM ET.

Mr Putnam said missing from the library were materials documenting JFK's dalliances with actress Marilyn Monroe.

BBC: JFK library to put all its records online

The JFK School of Government at Harvard University in Cambridge -- miles away from the library in the Dorchester section of Boston -- was evacuated.

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The JFK School of Government at Harvard University in Cambridge --- miles away from the library in the Dorchester section of Boston -- was evacuated.

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