TAIR HARFA, Lebanon - The big explosion that on Monday rocked the southern Lebanese town of Tair Harfa was caused by an undetonated rocket that had been fired into Lebanon during the 2006 war with Hezbollah but did not detonate on impact, according to a Lebanese security official.

However, UNIFIL spokesman Andrea Tenenti said UNIFIL soldiers in the area were still trying to ascertain the cause.

On Oct. 3, three Hezbollah members were killed when an explosion ripped through a weapons warehouse in the eastern Lebanon town of Nabi Sheet.

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