THE HAGUE, November 8 (IslamOnline.net & News Agencies) – A series of Muslim sites and mosques have come under racist attacks that are possibly linked to the murder of a controversial filmmaker.

An Islamic school in the Dutch city of Eindhoven was hit by an explosion early Monday, November 8, but no one was injured, reported Agence France-Presse (AFP).

Police said the explosion around 3:30 am (0230 GMT) caused serious damage to the entrance of the Tarieq Ibnu Zyad Islamic school and windows at nearby buildings were blown out.

Eindhoven mayor Alexander Sakkers told public Dutch radio that no one was hurt in the explosion but that people in the neighborhood were in shock.

He added that Muslim houses of worship and Islamic schools have been under surveillance since the murder Tuesday, November 2, of filmmaker Theo van Gogh but police patrols would be stepped up.

"It is essential that we stick together. One single person who pulls off such an idiot act ... should not have the result that our society goes to pot in this way," CNN quoted him as telling reporters.

The Dutch news agency ANP reported Sunday, November 7, that three Dutch mosques had been targeted in failed arson attempts at the weekend.

Police arrested three suspects as they tried to set fire to An-Nasr Mosque in the western town of Huizen late Friday, November 5.

Unidentified suspects also attempted to set fire to a mosque in Breda in the south, although the fire had petered out by the time police reached the scene.

In Rotterdam, a palette was set alight at the Mevlana Mosque, but the fire did not spread.

Pig heads and a placard with insulting slogans were nailed to the door of another mosque in the port city.

Vandals also daubed red paint over a Moroccan associative building in Amsterdam at the weekend.

Van Gogh was widely known for his criticism of Islam and recently caused an uproar with his short film Submission about Islam and women.