The European Union has warned Saudi Arabia it will take action at the World Trade Organization, if the kingdom supports a widening Muslim boycott of Danish products.

EU Trade Commissioner Peter Mandelson issued the warning as protests over cartoons of the Prophet Muhammad spread across the Muslim world. The cartoons were published in a Danish newspaper in September and include an image of the prophet wearing a turban shaped like a bomb.

In the Gaza Strip Monday, gunmen briefly occupied an EU office. And a Danish dairy company, Arla Foods, says its products have been boycotted throughout the Middle East.

Last week, Saudi Arabia recalled its ambassador to Denmark. Libya has already closed its embassy in Denmark.

Some information for this report was provided by AFP and AP.