Prime Minister Sheikh Hasina of Bangladesh has resigned, and the army will oversee the formation of an interim government, the country’s army chief said in a statement to the nation.

Ms. Hasina, 76, had ruled Bangladesh since 2009. She was forced out by weeks of protests that began peacefully and then transformed into deadly clashes with security forces. The army chief, Gen. Waker-uz-Zaman, said he had consulted the country’s political parties and civil society before making his announcement.