At a Senate hearing, Peiter Zatko, Twitter’s former head of security, told lawmakers that the company lied about its data practices.

The move, which is bound to heighten tensions with Beijing, reflects growing unease about China’s ability to access the personal information that Americans hand over to mobile apps and other services.

The company said on Thursday that it was looking into the scope of the apparent hack.

The video platform will let more creators earn payments and place ads in Shorts, its TikTok competitor, according to audio from an internal meeting.

Shou Zi Chew, TikTok’s chief executive, is balancing how to be an autonomous leader while juggling the demands of the app’s Chinese parent company.

British regulators have sent a warning notice to the company, the first major case under new rules in Britain that protect minors online.

A draft agreement with the Biden administration to keep the Chinese-owned video app operating in the United States is under review. That could mean more wrangling.