President Salva Kiir of South Sudan said what happened in Wad Madani was a heinous and "unacceptable" crime. He urged Sudan's government to protect South Sudanese citizens trapped there, and to investigate the killings with the help of international humanitarian organisations.

JUBA (Reuters) - South Sudan's police imposed a nationwide curfew starting at 6 p.m. (1600 GMT) on Friday after a night of rioting in the capital over the alleged killing of South Sudanese people by the army and allied groups in neighbouring Sudan.

South Sudanese authorities have imposed a countrywide dusk-to-dawn curfew after a night of violence during which businesses run by Sudanese traders in the capital were looted.

The curfew, starting at 6:00 pm daily, was announced Friday by Police Chief Abraham Manyuat on state television as new demonstrations erupted in Juba and other cities.

South Sudan on Friday declared a countrywide curfew after protests targeting businesses owned by Sudanese traders broke out in the capital, Juba on Thursday night. The dusk-down-curfew, according South Sudan Police Service (SSPS) will begin from 6pm-6am.

Police in South Sudan declared a nighttime curfew on Friday, the morning after anti-Sudanese protests in the capital Juba degenerated into looting.

South Sudan police have enforced a nationwide curfew following deadly riots in Juba over reported killings of South Sudanese in Sudan. Shops have closed as security forces relocate Sudanese citizens for safety.

South Sudan’s police on Friday imposed a nationwide curfew from 6:00 pm (1600 GMT) following a night of deadly rioting in the capital over the alleged killing by the army and allied groups in neighbouring Sudan.

Following a violent night involving looting of Sudanese-owned businesses in Juba, South Sudan has enforced a dusk-to-dawn curfew. The violence arose from alleged killings of South Sudanese by Sudanese militia.