Authorities say the man who traveled armed to a pizzeria in the nation's capital nearly a decade ago because of a fake online conspiracy theory has been shot and killed by police in North Carolina.

OAKLAND, Calif. – YouTube is following the lead of Twitter and Facebook, saying that it is taking more steps to limit QAnon and other baseless conspiracy theories that can lead to real-world violence. YouTube is the third of the major social platforms to announce policies intended rein in QAnon, a conspiracy theory they all helped spread. Twitter announced in July a crackdown on QAnon, though it did not ban its supporters from its platform. It did ban thousands of accounts associated with QAnon content and blocked URLs associated with it from being shared. Twitter also said that it would stop highlighting and recommending tweets associated with QAnon.