GOMA: More than 400 civilians have been killed as the Rwanda-backed M23 armed group continues its offensive in Kivu province in eastern Congo, regional officials said late Wednesday, adding that Rwandan special forces were in the strategic city of Uvira. M23’s latest offensive comes despite a US-mediated peace agreement signed last week by the Congolese and Rwandan presidents in Washington. The accord didn’t include the rebel group, which is negotiating separately with Congo and agreed earlier this year to a ceasefire that both sides accuse the other of violating.