A Nobel-prize nominated Congolese gynaecologist said on Tuesday he is too scared to return to his native Congo after an attempt on his life last month by armed men in one of the most violent parts of the Democratic Republic of Congo."I can’t guarantee my own security. As soon as I can guarantee I’ll be protected, I’ll be back,” Denis Mukwege told reporters during a visit to the European Commission in Brussels.A member of Mukwege’s staff was killed in the shooting attack at his home in South Kivu province but the gynaecologist escaped unhurt.Violence is common in both the North Kivu and South Kivu provinces, where Mukwege is based, with rebel soldiers commonly using rape as a weapon to intimidate communities and drive people from their land.Congo’s government has faced increased military tensions with its neighbour Rwanda over allegations from the U.N. and analysts that Kigali is behind an insurgency in the eastern part of the country.Mukwege, who runs a hospital for women and child victims of sexual violence in eastern Congo, said he believed the attackers wanted to kill him, but he still did not know why. Some media reports have speculated the attack may have had political overtones.