(BBC) A bomb explosion has hit an Islamic school in the Netherlands, as tensions run high after the murder of controversial film-maker Theo van Gogh.
Monday’s blast in the southern city of Eindhoven caused heavy damage, destroying doors and windows.
Police say it could be a revenge attack for the killing of Van Gogh by a suspected Islamic radical last week.
Mosques in several Dutch cities have been the targets of vandalism and failed arson attempts in recent days.
The Eindhoven explosion – which occurred around 0230 GMT on Monday – was caused by a “strong bomb or explosive”, a police spokesman told the BBC News website.
Windows in neighbouring buildings were shattered, he added. No-one was hurt.
Police are investigating possible links between the attack and Van Gogh’s killing.
The authorities have been on alert for revenge attacks on Muslims.
Over the past three days attempted attacks against Muslim targets have been reported in the cities of Amsterdam, Rotterdam, Breda and Huizen.
The film-maker was shot and stabbed in Amsterdam on Tuesday.
Several men, all believed to be Islamic radicals, have been arrested.
The Dutch government has vowed to take tough action against Muslim militants.
Police say they found a letter signed by an unknown group on Van Gogh’s body containing threats to kill liberal politician Ayaan Hirsi Ali.
Ms Hirsi Ali is a Somali refugee who wrote the script to Van Gogh’s controversial film Submission, which criticised the treatment of women under Islam.
On Sunday Dutch police arrested two men who had allegedly called for the beheading of Geert Wilders, a member of parliament, in the name of Islam.
Mr Wilders has said he will set up an anti-immigration party in the wake of Van Gogh’s death.