In further evidence that there won’t be a peaceful transition from a unified Sudan to two states, a U.N. spokesman says helicopters there are taking fire. Both Sudan and the newly formed state of South Sudan—which will officially become independent in July—claim Abyei. The international community has backed South Sudan’s right to the territory, but Sudanese President Omar al-Bashir has refused to leave. The U.N. accused members of a militia belonging to a nomadic, northern-aligned tribe, which denied the charge. No one was injured.