Rwanda-backed rebels claimed they captured eastern Congo’s largest city, Goma, early Monday, as the United Nations described a mass panic among its 2 million people and Congo’s government said the rebel advance was a “declaration of war.

M23, which refers to the March 23, 2009, accord that ended a previous Tutsi-led revolt in eastern Congo, is the latest group of ethnic Tutsi-led insurgents to take up arms against Congolese forces. It launched the current rebellion in 2022.

M23 militia fighters, alongside Rwandan troops, are pushing into the eastern DR Congo city of Goma, capital of the mineral-rich North Kivu province.