MADRID, July 23 (Xinhuanet) -- Spanish police arrested two suspects on Saturday after a small bomb exploded in the northwestern Santigao de Compostela city, causing minor material damage but no causalities.

    The explosion occurred at 15:45 local time (1345 GMT) near a central square in the capital of Galicia province, after the authorities received a bomb threat half an hour before.

    Some media reports said the explosion was originated by a package detonated by police near Galicia Square, but others said the bomb exploded in a parking lot.

    Police cordoned off the zone and evacuated some nearby buildings.

    The authorities said the two detainees are linked to a movementfor the independence of Galicia.

    In recent days, police reinforced security in Santiago de Compostela prior to the upcoming Santiago Apostol fair, scheduled for July 25, which is expected to attract thousands of visitors. Enditem