M23 rebels in the Democratic Republic of Congo on Wednesday captured Nyabibwe, a city in the eastern province of South Kivu, according to local media. The Alliance Fleuve Congo, a rebel alliance that includes M23, declared a unilateral ceasefire beginning Tuesday due to humanitarian difficulties after the rebels took control last week of the city of Goma, the capital of neighboring North kivu state.

According to local media, M23 rebels seized Nyabibwe, a city in the Democratic Republic of Congo’s eastern province of South Kivu, on Wednesday. The Alliance Fleuve Congo, a rebel alliance that includes M23, declared a unilateral ceasefire on Tuesday due to...