An Argentinian woman has been killed in a crash in Otago.

Carolina Patron Costas, 23, was killed when her car hit a tree on Malaghans Rd, about halfway between Queenstown and Arrowtown yesterday morning.

Emergency services were notified about 6.45am.

Acting Sergeant Terry Wood said it appeared the woman lost control of the vehicle and it slid sideways into a tree.

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The woman's family had been notified and the Argentinian embassy had been assisting with inquiries with her family.

The incident had been referred to the coroner.