“The investigation into the fire is continuing. Police will question witnesses and verify whether there were security cameras in the area,” the police said in a statement on their website.

The fire broke out on Monday around noon in Eskilstuna, a town of 108,000 people 150 kilometres (93 miles) west of Stockholm, causing no injuries, a police spokesman told AFP.

There are no suspects and no arrests have been made.

“The mosque is almost completely destroyed, nothing can be saved,” mosque spokesman Anas Deneche told AFP.

Deneche said the mosque had been the target of several acts of violence in the past year and his family had been threatened.

“But it’s still too early to draw any conclusions (about the cause of the fire), we’ll have to wait for the police to do their work,” he said.

Police said they were investigating several leads but provided no other details.

Between 15,000 and 20,000 Muslims live in Eskilstuna.

The mosque fire coincides with a spate of public desecrations of the Holy Quran in Sweden in recent months. The burnings have sparked widespread outrage and condemnation in Muslim countries.

The country has condemned the desecrations of the Holy Quran but upheld its laws regarding freedom of speech and assembly.

The government has vowed to explore legal means of stopping protests involving the desecration of holy texts in certain circumstances, though a majority appear to be opposed to such a change.