"They x-rayed the cylindrical shell, which was about 10 inches (25cm) and confirmed it was a live incendiary device, " a spokesman said.

BBC: Unexploded WWII bomb found in Balsall Common

Kennedy library, but police said later it was a fire that may have been caused by an incendiary device, and it was not clear whether it was related to the bombings.

NPR: On Screens, Familiar Images Of Terror Flash