A Jewish school in Amsterdam was damaged after an overnight explosion against its exterior wall, Mayor Femke Halsema said in a statement Saturday, denouncing the blast as a "cowardly act of aggression...

No one was hurt in the explosion at a Jewish school in Amsterdam, or in an earlier one at a Rotterdam synagogue.

The explosion at the school in an upscale residential neighbourhood on the south side of Amsterdam damaged a rainpipe and charred ​an outer wall.