In a tragic incident in Nigeria's northwest Zamfara state, at least 100 civilians lost their lives due to a military airstrike targeting the bustling Tumfa market, Amnesty International reported on Tuesday. The organization has called for an urgent investigation into the incident. This devastating airstrike, which occurred Sunday in the remote Zurmi district, marks the second time in a month that a crowded market in northern Nigeria has been hit, resulting in numerous casualties. According to Amnesty, medical…