ZURICH (AP) — Reflecting concern over the possibility of postelection violence, America's top diplomat is seeking separate meetings with Nigeria's president and his leading opponent ahead of voting as part of an effort to encourage both sides to accept the results peacefully. Kerry will appeal to Jonathan and Buhari to instruct their supporters to refrain from violence, said senior State Department officials, who briefed reporters Saturday under ground rules that they not be identified. "The conflict is being sustained by masses of unemployed youth who are susceptible to Boko Haram recruitment, an alienated and frightened northern population that refuses to cooperate with state security forces, and a governance vacuum that has allowed the emergence of militant sanctuaries in the northeast," the CNA paper said. "The conflict is also being perpetuated by the Nigerian government, which has employed a heavy-handed, overwhelmingly (military) approach to dealing with the group and has paid little attention to the underlying contextual realities and root causes of the conflict," the report said, a view that comports with the assessment of the U.S.