Swissnuclear, a pro nuclear power lobby group in Olten, Switzerland, was bombed on 31 March. Police suspect it was by anti-nuclear activists.

Two women were injured when the package they were opening exploded.

Swissnuclear works to promote the use of nuclear power.

Little Switzerland has five nuclear power plants. The government canceled plans to restart three old plants, after the disaster at Japan’s Fukushima Daiichi plant.