Malmö is, of course, the city from which [1] Jews are already fleeing because of antisemitic attacks from the Muslims there. "Attack Against the Synagogue in Malmö Revives Threat Concerns for the Jewish Community," from [2] Sweden Israel and the Jews, July 25 (thanks to Joseph):

In the early morning hours on Friday a large explosion was reported outside Malmö's synagogue. The explosion is suspected to have been caused by a substantial firecracker and is seen as an attack on the synagogue. The attack can also be seen as a resurgence of the threat against the Malmö Jewish community.

Some minutes before 2am the night between July 22nd and the 23rd a big explosion was reported outside the synagogue in Malmö. Residents living close to the synagogue reported that an explosion was heard and there was also a very bright flash. Spokesperson for the police, Göran Billberg commented that the explosion most probably was due to "some kind of firecracker", and did not characterize the explosive as a bomb.

The local newspaper Sydsvenskan reported incorrectly that no damage was done to the synagogue; in fact the explosion was so strong that several of the synagogue windows were blown out by the blast. [...]

The local police force feels that it is not necessary to enforce security around the synagogue although it is evident that the Jewish Community remains in a state of constant threat....