'They killed all these young people' - BBC investigates alleged massacre in rebel-held Congolese city / 'We're afraid to return home': Uprooted again, Congolese civilians face hunger and more insecurity / Gunfire and looting in DR Congo city as rebels advance / DR Congo crisis: Thousands flee clashes in South Kivu / Congolese civilians caught in a growing rebellion face a terrible choice / Tyres burned, embassies attacked in DR Congo's Kinshasa protests / Sky News team in Democratic Republic of Congo attacked as civilians flee / At least 72 people are killed in a militia attack near Congo's capital in a conflict over land / Dozens killed by suspected DR Congo rebels in spate of attacks / US condemns attacks on DR Congo camps for displaced people