A South Sudanese man casts his vote in a ballot box while carrying his child at a polling center during the third day of the South Sudan independence referendum in the city of Um Durman, Sudan, on Jan. 11. Thousands of people began casting ballots on Jan. 9 during a week-long vote. The mainly Christian south is expected to secede from the primarily Muslim north. Nasser Nasser/AP
South Sudanese men wait to casts their vote at a polling station in Juba, South Sudan, on Jan. 10. Jerome Delay/AP
A South Sudanese woman waits to cast her vote at a polling station in the small rural village of Peiti, South Sudan, on Jan. 9. Jerome Delay/AP
A South Sudanese woman casts her vote at a polling center in Juba, South Sudan, on Jan. 10. Pete Muller/AP
A polling center official explains to a South Sudanese woman the two voting signs contained in the ballot, separation and unity, at a polling center during the third day of the referendum in Um Durman, Sudan, on Jan. 11. Nasser Nasser/AP
Daniel Chol looks around as his mother, Josephena Thal, prepares her ballot in a referendum vote at St. James Catholic Church in Glendale, Ariz., on Jan. 9. The polling place in Glendale was one of only eight in the entire US. David Wallace/The Arizona Republic/AP
South Sudanese who have returned to South Sudan on barges stand on the banks of the Nile river in Juba's port on Jan. 10. Jerome Delay/AP
A member of Sudan People's Liberation Movement (SPLM) sits at a checkpoint in south Kordofan, South Sudan, on Jan. 11. SPLM, the former southern rebel, now rules a semi-autonomous authority in the southern capital of Juba. Zohra Bensemra/Reuters
South Sudanese occupy a barge on which they have returned to South Sudan in Juba's port on Jan. 11. Jerome Delay/AP
South Sudanese children who have returned to South Sudan by barge sit amidst their belongings in Juba's port on Jan. 10. Jerome Delay/AP
South Sudanese children dressed in their Sunday best, who returned to South Sudan by barges on the Nile river, sit in Juba's port on Jan. 11. Jerome Delay/AP
A South Sudanese woman carrying her child stands at her home in south Kordofan, South Sudan, on Jan. 11. Zohra Bensemra /Reuters
Video footage and eye witness accounts from the scene of a brutal murder in London on Wednesday seem to indicate that the attackers may have been politically motivated. Counterterrorism officers are leading the investigation. Two men have been arrested.
Two men with butcher knives hacked another to death Wednesday near a London military barracks and one then went on video to explain the crime — shouting political statements, gesturing with bloodied hands and waving a meat cleaver. Soon after, arriving police shot and wounded the unidentified assailants and took them into custody.