ADDIS ABABA, Ethiopia — Ethiopia’s Parliament voted unanimously Thursday to extend the country’s state of emergency for another four months after top officials warned of the continuing threat of unrest.

Ethiopia, Africa’s second most populous country and regional powerhouse, declared the state of emergency in October after widespread rioting broke out and foreign factories were attacked after dozens of people died at a cultural festival.

Ethiopia is a US ally in the fight against extremism in the region and has also become a magnet for foreign investment, especially in manufacturing.

The state of emergency imposed restrictions on freedom of assembly and gave security forces wide powers to arrest people and search premises.

Washington Post