evidence: "We are very worried because this thing can engulf the whole region if we are not careful," said Home Affairs Minister Edgar Lungu. "What we have done is to send the head of the military to meet our colleagues in DRC, Rwanda, Burundi, Tanzania and the entire region because we all appreciate that we are together, we swim together or drown together." [...] Last week, some humanitarian agencies said over 400 Congolese refugees crossed into the Chiengi district in the Luapula Province of Zambia.