Rights groups and critics say Prime Minister Sheikh Hasina has grown more autocratic during 15 years in power, marked by mass arrests of political opponents and activists, forced disappearances and extrajudicial killings, charges she denies.

Protests led by students broke out in June when a high court ordered the restoration of quotas in government jobs, including reservations for families of veterans of the 1971 war for independence from Pakistan.

Police fired rubber bullets, tear gas and…