May 16 (Reuters) - The U.S. State Department has

approved the potential sale of support for U.S. Army supplied

systems to Ukraine for an estimated $100 million, the Pentagon

said on Thursday.

The State Department has also approved the potential sale to

NATO of Alliance Ground Surveillance Program Equipment and

Support and related equipment for an estimated $250.2 million,

the Pentagon said. The principal contractor will be Northrop

Grumman ( NOC ), it said.