Updated

A Ugandan official says hundreds of South Sudanese have fled into Uganda to escape tribal clashes in South Sudan as well as tension stemming from a border conflict with Sudan.

Deputy Relief Minister Musa Ecweru said Friday more than 300 South Sudanese had crossed into Uganda in the last month.

Catherine Ntabadde, a spokeswoman for the Uganda Red Cross, said her team had counted at least 337 refugees at a reception center in the frontier district of Adjumani.

Foreign Affairs Minister Okello Oryem told Uganda's parliament on Thursday that the influx of refugees from South Sudan posed a security risk to Uganda.

Sudan and South Sudan have at times come close to all-out war over issues relating to the border and oil revenue.

South Sudan became independent last year.