Biden vows to punish those behind hack against U.S. government

FILE PHOTO: U.S. President-elect Joe Biden looks at his watch as he arrives to announce former South Bend, Indiana Mayor Pete Buttigieg as his nominee for secretary of transportation during a news conference at Biden's transition headquarters in Wilmington, Delaware, U.S., December 16, 2020. Picture taken December 16, 2020. REUTERS/Kevin Lamarque/Pool

WASHINGTON (Reuters) - U.S. President-Elect Joe Biden said Thursday that a recently uncovered far-reaching cybersecurity breach against the U.S. government was a matter of “great concern” and vowed swift action in response once he takes office next month.

Biden, who will become president on Jan. 20, said his team will make the breach a top priority and would impose “substantial costs” on parties responsible for such cyberattacks.

“Our adversaries should know that, as President, I will not stand idly by in the face of cyber assaults on our nation,” he said in a statement.

Reporting by Pete Schroeder; editing by Susan Heavey