The blast took place at around 4 am in front of the synagogue, damaging the windows of the buildings in its surroundings, a police spokesperson stated.
A historic synagogue was damaged in an explosion in the early hours of Monday morning in the Belgian city of Liège, police said.
A spokesperson for the police in the eastern Belgian city said that no injuries were reported, "only material damage" being sustained. Authorities are investigating the cause of the blast.
The blast took place at around 4 am in front of the synagogue, damaging the windows of the buildings in its surroundings, a police spokesperson added. The Belgian federal prosecutors' office in charge of organised crime and terrorism said it will probe the incident.
The mayor of Liège Willy Demeyer denounced the incident as an "antisemitic act", adding that "we cannot allow foreign conflicts to be imported into our city".
A security perimeter was set up around the area, with federal police heading towards the scene, according to Belgian public broadcaster RTBF.
The synagogue was built in 1899, and also serves as a museum for Liège's Jewish community.
This is a developing story and our journalists are working on further updates.