The chairperson of Gambia's electoral commission has fled the country. Alieu Momar Njai has reportedly been threatened several times since he declared President Yahya Jammeh lost December's presidential polls. It's not clear where he may have gone. On Monday, Gambian security forces closed down three private radio stations, amid an escalating political crisis triggered by Jammeh's refusal to step down. His refusal to relinquish power has raised the possibility of a military intervention by West African forces. Regional body ECOWAS says it's put military forces on high alert -- something Jammeh has described as a declaration of war.