Dutch police suspect that an explosion overnight at an Islamic school in the city of Eindhoven could be linked to last week's murder of controversial filmmaker Theo van Gogh. Lauren Comiteau reports from Amsterdam on the continuing violence in the wake of the van Gogh murder.

The school's entrance was severely damaged and nearby windows were blown out, but no one was hurt in the early-morning explosion. Eindhoven Mayor Alexander Sakkers says officials are reaching out to shocked neighborhood residents.

The mayor says, "We can not let a couple of idiots ruin our community." He says city officials will find a political way to solve the problems.

His police chief, meanwhile, says his forces are working to solve the case as quickly as possible.

Security has been increased in Eindhoven since Mr. van Gogh's murder in Amsterdam early last week. Now, more will be added.

An alleged Islamic militant has been arrested for the killing, along with several alleged accomplices, all of whom are also suspected of being Islamic militants.

The filmmaker outraged Muslims with a recent short film depicting violence against women in the Muslim community - in particular by showing texts from the Koran scrawled on their bodies.

Eindhoven's arson incident is one of four that were attempted during the weekend. Three others at mosques around the country were unsuccessful, but police made some arrests in one town.

In Rotterdam, a city with a large Muslim immigrant population, a pig head and a sign with insulting slogans were left at a fourth mosque.

Since last week's murder, there have been death threats against politicians and calls from Dutch officials to expand the security service. One politician has announced plans to start a new right-wing, anti-immigration party.