FILE PHOTO - Lockheed Martin's logo is seen during Japan Aerospace 2016 air show in Tokyo, Japan, October 12, 2016. REUTERS/Kim Kyung-Hoon

WASHINGTON (Reuters) - Lockheed Martin Corp LMT.N is being awarded a $459.2 million (£324.1 million) modification to a previously awarded contract for production of additional Terminal High Altitude Area Defense (THAAD) interceptors and related services, the Pentagon said on Friday.

The change raises the value of the contract to $1.29 billion, the Pentagon said.