Border police are on high alert in Spain’s north African enclave Melilla after some 500 mainly West African migrants charged razor-wire fences along Morocco’s frontier with the EU.Sixty five made it through but many were injured in the process. It was the latest of several desperate attempts by migrants to cross from Morocco to Melilla and Spain’s other enclave Ceuta. Five people died in a similar attempt last week. Spanish authorities have sent extra troops to the area and are planning tofortify border fences. For some of those who made it over today, it was their third or fourth attempt and many are willing to risk death to escape grinding poverty. It is a tactic which has many locals worried. “We’re already living in a densely populated town,” said one Spanish resident of Melilla. “There are too many people for such a small place.” Spain has few repatriation agreements with African countries. That means that once over the fence, many migrants are likely to be transferred to mainland Spain.