BEIJING, June 22 (Xinhua) -- China's Ministry of Finance on Monday announced a notice prohibiting the purchase of products manufactured by 46 designated U.S. companies in government procurement.

Under the new measure, procurement entities participating in government purchasing activities are barred from buying products made by the listed U.S. firms, including Lockheed Martin Corporation and Raytheon Missiles & Defense.

The measure was approved in accordance with relevant Chinese laws and regulations, the ministry said, adding the restriction does not apply to U.S.-invested companies operating in China.

The measure takes effect from the date of issuance.