RIYADH, May 2 (Reuters) - Saudi Arabia's Public Investment Fund, its top sovereign wealth fund, will make half of its investments in the domestic economy, Deputy Crown Prince Mohammed bin Salman said on Tuesday.

In a nationally televised interview discussing the government's economic policies, Prince Mohammed also said authorities would announce a housing programme in the third quarter of this year.

The government will provide over 1 million housing units through soft loans or the Saudi Real Estate Development Fund, he said without giving a time frame.

Prince Mohammed said the government was committed to providing medical treatment to its citizens but would not necessarily manage hospitals.

(Reporting by Riyadh team; Writing by Andrew Torchia) ((andrew.torchia@thomsonreuters.com; +9715 6681 7277; Reuters Messaging: andrew.torchia.thomsonreuters.com@reuters.net))