MEXICO CITY — Mexico’s president confirmed Wednesday night that the collapse of a stage during a campaign rally in northern Mexico has killed four people and injured 15. The stage collapse, caused by a strong gust of wind, occurred during an event attended by presidential long-shot candidate Jorge Álvarez Máynez, who was sent flying by the wind. [time-brightcove not-tgx=”true”] Mexican President Andrés Manuel López Obrador said he “sends a hug to family members, friends of the victims and political supporters.” Lamento el accidente en San Pedro Garza García, causado por un fuerte viento durante el acto al que asistieron Jorge Álvarez Máynez, candidato a la presidencia por Movimiento Ciudadano y otros militantes, dirigentes y candidatos de ese partido.