(Corrects to make clear that the missile hit the office of the Iraqi vice president, not the speaker of parliament)

BAGHDAD, March 28 (Reuters) - The office of Iraqi Vice President Tareq al-Hashemi was hit in a mortar or rocket strike on Baghdad's Green Zone government and diplomatic compound on Friday, and a security guard was killed, an official in his office said.

Hashemi was not in the office and nor were any of his staff as it was the Muslim Friday holiday, the official said, speaking on condition of anonymity. (Reporting by Waleed Ibrahim; Editing by Kevin Liffey)

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