Fighting has escalated sharply in recent weeks in eastern Congo, where rebels have seized key towns and are closing in on the city of Goma, the government’s last stronghold in the North Kivu province,

A rebel alliance spearheaded by the ethnic Tutsi-led M23 militia said it had seized the lakeside city of more than 2 million people.

In the last 48 hours, two U.N. peacekeepers from South Africa and one from Uruguay were killed and 11 peacekeepers were injured and hospitalized.