The Trump administration's restrictions on Americans' abilities to update Chinese-owned TikTok and WeChat could degrade user security further, experts say.

Tweets meant to undermine confidence in the electoral process will be flagged or removed.

Meanwhile, the company caught an American firm violating foreign interference rules.

The site, which launched with the aim of fighting "viewpoint censorship," has drawn the scrutiny of cybersecurity researchers.

The suspect, a 17-year-old, was charged with 30 felony counts.