The source said the tree -- located at the site of the second blast -- was removed along with the surrounding grate, where the explosive device's circuit board was found.

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Ginkgo, made from the nuts and leaves of a tree, is a rich source of antioxidants - substances which it is thought can neutralise free radicals.

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"When Shearer arrived at the source of the fire, he found a pile of debris burning under an oak tree, " a News Press article said.

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