Internet companies must do more to remove extremist content before it becomes visible to users, the EU said during the recent EU Internet Forum.
The EU said major platforms have created automatic tools to detect and remove terrorism-related content online and the next step is to bring all internet companies together to ensure that such content is not visible on the internet.
It also emphasised speeding up the reporting process and asked for more transparency from internet companies.
Social media companies recently reported how much content they have taken down in their efforts to combat terrorism-related content.
Twitter Inc. said it removed about 225,000 accounts between January and June before they could post their first tweet, while YouTube removed about 150,000 videos since June. Meanwhile, Facebook Inc. removed 83% of copies of terrorism-related content within one hour.
The EU commissioner for the security union, Julian King, said the EU will propose legislation to combat terrorism online, if necessary.