RABAT – The Moroccan military has intervened in a U.N.-patrolled border zone in the disputed Western Sahara to clear a key road it said was being blockaded for weeks by supporters of the pro-independence Polisario Front.Moroccan forces set up a security cordon overnight in the Guerguerat buffer zone on Western Sahara’s southern border with Mauritania, “in order to secure the flow of goods and people through this axis,” the General Staff of the Moroccan Royal Armed Forces said in a statement Friday.It said they intervened because about 60 people supervised by Polisario were blocking a road connecting Morocco with Mauritania, and called it a “non-offensive operation” that would involve use of arms “only in the case of self-defense.”The.