Four members of the Chinese military have been charged with breaking into the computer networks of the Equifax credit reporting agency and stealing the personal information of tens of millions of Americans, the Justice Department said Monday, blaming Beijing for one of the largest hacks in history to target consumer data.

President Joe Biden said Tuesday that damage to U.S. businesses in the biggest ransomware attack on record appears minimal, though information remained incomplete.

A ransomware attack paralyzed the networks of at least 200 U.S. companies on Friday, according to a cybersecurity researcher whose company was responding to the incident.