One Italian UNIFIL soldier died on Friday after a bomb blew up a UN vehicle on a highway leading to the southern Lebanese port city of Sidon, security sources said.

Four other Italian peacekeepers were wounded in the attack, the sources said.

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A spokesman for the UN peacekeeping force in Lebanon said the bomb had been aimed at a logistics convoy.

"We have reports of casualties of UNIFIL peacekeepers," spokesman Neeraj Singh told Reuters. He could not disclose their nationalities.

The explosion happened on the UN's International Day of United Nations Peacekeepers, when peacekeepers killed in missions across the world are commemorated by their colleagues.

UNIFIL has about 12,000 troops and naval personnel in Lebanon after its expansion under a UN Security Council resolution that halted the Second Lebanon War in 2006.

A car bomb killed six UN peacekeepers in Lebanon in June 2007.

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