KABUL, Afghanistan (AP) - Mazar-e-Sharif, the fourth-largest city in Afghanistan, fell to the Taliban on Saturday after a multipronged assault launched by insurgents, according to a lawmaker.Balkh lawmaker Abas Ebrahimzada said the province’s national army corps surrendered first, which prompted the pro-government militias and other forces to lose morale and give up in the face of the onslaught.According to the lawmaker, all of the provincial installations, including the governor’s office, are in Taliban hands.RELATED: Taliban seizes 4 more cities in sweep across southern AfghanistanThe insurgents have captured much of northern, western and southern Afghanistan in a breakneck offensive less than three weeks before the U.S.