BEIJING, May 22 (Reuters) - China has taken counter

measures against 12 U.S. military industrial companies and their

senior executives, including units of Lockheed Martin ( LMT ) and

Raytheon, the foreign ministry said on Wednesday.

The measures, which include freezing movable, immovable and

other types of assets in China, as well as banning entry for

senior executives, would take effect from Wednesday.