WASHINGTON:  President Joe Biden's administration is readying about $800 million of additional military aid to Ukraine and could announce it as soon as Friday, three sources familiar with the matter said on Thursday.

Biden would authorize the assistance using his Presidential Drawdown Authority, which allows the president to authorize the transfer of excess weapons from U.S. stocks, the sources told Reuters.

(Reporting by Patricia Zengerle, Idrees Ali and Steve Holland; Editing by Leslie Adler)