North African Muslim invaders from Morocco brandishing bottles, sticks and stones broke into Spain’s northwest African enclave of Melilla.

n a statement from the Interior Ministry’s Melilla office, the storming was the second in a week and led to the injury of one police officer, who was apparently struck by a migrant on the head with a stick in the pre-dawn melee.

According to the police, some 300 migrants attempted to cross the six-meter (20-feet) high double barbed wire border fence, with 214 managing to get in. Thousands try each year to enter the city, which is on the Mediterranean Sea, and Spain’s other coastal enclave, Ceuta. On Feb. 6, at least 15 migrants drowned while trying to enter Ceuta by sea.

Carlos Montero, who runs the temporary accommodation center in Melilla for migrants, told Spanish National Radio that the facility now has 1,300 migrants, mostly from sub-Saharan Africa. The center was intended to only house 500. Those that manage to cross into the enclaves are normally placed in temporary centers while authorities try to repatriate them.

In recent months Moroccan authorities have been trying to clear forest areas around the enclaves, moving migrants to cities far from the border. There are an estimated 25,000 sub-Saharan Africans living illegally in Morocco, most hoping to make it to Europe.

Some 500 migrants stormed the fence on Monday and about 100 made it over in what an official described as a “very violent” assault that left 27 people injured.