The bomb went off without warning . Some other demonstrations have turned deadly . At least nine people were killed and 73 injured in Kandahar on Saturday , and 12 people died Friday -- including seven U.N. employees -- when angry demonstrators stormed a U.N. compound in Mazar-i-Sharif . They have been sparked by a Florida mosque 's burning of the Muslim holy book .
The bomb went off without warning . Some other demonstrations have turned deadly . They have been sparked by a Florida mosque 's burning of the Muslim holy book .