WASHINGTON, Nov 10 - The U.S. will buy 100,000 rounds of howitzer artillery from South Korean manufacturers to provide to Ukraine, a U.S. official said Thursday, in a deal the two governments have been working on for some time.

The agreement comes as Ukrainian leaders press for more weapons and aid to take advantage of a counteroffensive that is pushing Russian forces out of some areas they had taken over earlier in the war, The Associated Press reported.