Ryan Tracy

David Redl, assistant secretary for communications and information in the Commerce Department, abruptly resigned, days after criticizing US 5G policy in a speech. Redl, who headed the National Telecommunications and Information Administration, had clashed with Trump administration colleagues over a range of issues related to 5G rollout, including federal policy for allocating airwaves. The conflicts within the Administration occasionally had played out on Capitol Hill in recent weeks.

US regulators said a vulnerability in banks' computer networks could have exposed sensitive information to hackers, and they instructed both small institutions and Wall Street firms to update their security systems.

The alert from the Federal Financial Institutions Examination Council said the "Heartbleed" encryption bug may have allowed hackers to access the private "keys" to banks' servers, allowing them to decrypt and view sensitive information.

The Federal Deposit Insurance Corporation, one of the members of the council, said it wasn't aware of attackers exploiting the Heartbleed flaw that became public in recent days but said banks should assume that their security systems may have been breached. Regulators said hackers may have accessed sensitive information without the banks' knowledge.