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ReutersSANAA, March 17 (Reuters) - A suicide bomber behind a deadly attack that killed four South Korean tourists in Yemen was trained in lawless Somalia, just across the busy Gulf of Aden shipping route, a Yemeni security official said on Tuesday.
The bombing, which is likely to further damage the impoverished country's nascent tourism sector, came after repeated calls by al Qaeda leaders for attacks on non-Muslim foreigners in the Arabian Peninsula.
Violence in Yemen has affected foreign firms developing its oil and gas sector, while attacks on foreigners -- including kidnappings by tribesmen -- have hit tourism, diplomats say.
Yemen, the ancestral homeland of Osama bin Laden, has for years been battling al Qaeda and similar groups, but no group has yet claimed responsibility for Sunday's attack.
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