European officials pushed on Tuesday for American technology giants to do more to tackle online hate speech across the region, adding to the chorus of policy makers worldwide demanding greater action from the likes of Facebook, Google and Twitter.

The rebuke came a day after many of those companies announced that they were joining forces to fight the spread of terrorist content on the internet, agreeing to share technology and information to prevent propaganda and other dangerous materials from being disseminated on their services.

Amid growing security tensions in much of the Western world, governments, intelligence agencies and advocacy groups want Google, Microsoft and other technology companies to take further steps to curb hate speech on digital platforms, as well as to clamp down on how terrorists circulate information online.

But freedom of expression campaigners have warned that such demands may limit people’s ability to communicate across the internet, and they have cautioned that the line between hate speech and legitimate political discussion can be blurry.