Belgian Prime Minister Charles Michel believes there will be new attacks in Europe, including in Belgium.
Michel said that after the Brussels attack the security alert remains at level three, on a four-tier scale, which is considered "a level of concern", Efe news agency reported.
Michel acknowledged the necessity of improving coordination between different information services.
He added that all necessary steps should be taken to enhance action in the security field.
The Brussels attacks, which targeted Zaventem airport and Maelbeek subway on March 22, killed at least 34 people.