SYDNEY—Several foreign owners of residential property across Australia have been ordered to sell as the government intensifies its crackdown on the abuse of homeownership laws by buyers from China and elsewhere.

Treasurer Joe Hockey said foreign investors have been ordered to sell six properties in the cities of Sydney, Brisbane and Perth. The homes are valued between 152,000 and 1.86 million Australian dollars (US$112,768 and US$1.38 million).

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