Militants affiliated with the Islamic State burned down a health center treating Ebola patients in the Democratic Republic of Congo this week, forcing infected patients to flee amid violence that killed dozens of people, according to health and United Nations officials.

At least 48 people were killed in the attacks, officials said. It started late Thursday with a series of attacks in and around Cantine-Aloya, a village about 28 miles west of Beni, a city in eastern Congo. Several dozen homes and shops were burned, forcing residents to flee the area. Two other health facilities were also set on fire.