A Bangladeshi student group has vowed to resume protests that sparked a lethal police crackdown and nationwide unrest unless several of their leaders are released from custody on Sunday. Army patrols and a nationwide curfew remain in place more than a week after they were imposed, and a police dragnet has scooped up thousands of protesters including at least half a dozen student leaders. Last week’s violence killed at least 205 people, according to an AFP count of police and hospital data, in one of the biggest upheavals of Prime Minister Sheikh Hasina’s 15-year tenure.