Both companies received warning letters from EU Commissioner Thierry Breton last week, following the outbreak of the conflict between Israel and Hamas.
The bloc is ramping up pressure on social media companies to comply with its new online regulations amid the deluge of misinformation and graphic content online.
Neither company responded to a request for comment Friday.
The formal request marks a more aggressive step by the EU, which noted in Thursday’s announcement that it could decide to open formal proceedings against Meta or TikTok depending on their responses.
Meta and TikTok have until Wednesday to provide more information about their “crisis response” and until Nov. 8 address separate concerns about protecting election integrity and minor safety.
While the request to TikTok doesn’t specifically mention the Israel-Hamas conflict, it does ask about the platform’s efforts to stop the spread of terrorist and violent content, hate speech and disinformation.
Read more in a full report at TheHill.com.