U.S. lawmakers said Wednesday that congressional action might be needed in response to what one Democrat called "the start of cyberwarfare" against American democracy.

Exasperated U.S. senators harshly criticized representatives of Facebook, Twitter and Google at a hearing Tuesday for not doing more to prevent Russian agents interfering with the American political process.

A leading purveyor of fake news in the 2016 U.S. presidential election has died outside Phoenix at the age of 38.