A top official at Facebook pledged to “aggressively remove” terrorist content after British Prime Minister Theresa May called for stricter Internet regulations after a terror attack in London.

Facebook wants to “provide a service where people feel safe,” according to a statement from director of policy Simon Milner posted on Yahoo News. “That means we do not allow groups or people to engage in terrorist activity, or posts that express support for terrorism. We want Facebook to be a hostile environment for terrorists.”